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Home / DTC / B1295 — Battery supply relay circuit short to ground

B1295 — Battery supply relay circuit short to ground

Detailed page for trouble code B1295.

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Code

B1295

ALFA ROMEO B — Body

Battery supply relay circuit short to ground

Brand: ALFA ROMEO
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged insulation or chafed wiring in the battery supply relay feed harness contacting chassis ground
  • Shorted relay internal coil or contacts to ground
  • Corroded or loose relay socket/connector causing low-resistance path to ground
  • Aftermarket accessory incorrectly wired to the battery supply circuit and grounded
  • Faulty components downstream creating a direct short to ground (e.g., control unit, fan motor, pump)
  • Blown or partially shorted fuse or fusible link in supply circuit

Symptoms

  • Battery drain or discharged battery
  • Intermittent or complete loss of power to systems controlled by the relay
  • Blown fuse(s) for related circuits
  • No-crank or no-start if starter/feed is on affected circuit
  • Multiple warning lights or ECU communication errors
  • Relay clicking or overheating

What to check

  • Check for stored freeze-frame or related fault codes in other modules
  • Visually inspect relay, relay socket, and adjacent wiring for damage, melting, corrosion or pin contact
  • Check fuses and fusible links for continuity and signs of overheating
  • Measure battery voltage at rest and with ignition ON
  • With ignition off, measure resistance between supply feed pin and chassis ground to detect low-resistance short
  • Use a fused jumper or test lamp in series to locate the short by pulling fuses or unplugging connectors downstream

Signal parameters

  • Battery voltage at relay supply terminal: approx. 11.5–12.8 V (key off); 12–14.5 V (engine running)
  • Relay control pin (with ignition ON and relay commanded ON): battery voltage (~12 V) or PWM depending on design
  • Relay coil resistance (typical): 50–200 ohms (varies by relay) — open circuit indicates coil failure
  • Resistance between supply feed pin and chassis ground when circuit should be open: should be very high/OL; short to ground will show low ohms (near 0–2 ohms)
  • Crank/starting condition: supply voltage should remain above ~9.5 V during cranking; large drops indicate heavy short

Diagnostic algorithm

  1. Retrieve fault memory and any related codes from all modules; note freeze-frame data and when code sets.
  2. Visually inspect the relay, fuse, relay socket, and immediate wiring. Look for melting, corrosion, pin displacement, or aftermarket splices.
  3. Check associated fuses/fusible links for continuity. Replace blown fuses only after locating cause of short.
  4. With ignition OFF, disconnect the battery negative terminal for safety if performing prolonged repairs. For short tracing, keep battery connected and use a fused test jumper or test lamp to avoid damage.
  5. Remove the battery supply relay. Measure resistance between the supply feed terminal in the relay socket and chassis ground. A low resistance indicates a short in the harness or downstream component.
  6. If a short is present, isolate the circuit by unplugging connectors or removing fuses for downstream loads one at a time while monitoring the resistance or test lamp. When the short disappears, the last disconnected module/connector is suspect.
  7. Inspect/repair the identified wiring run: repair chafes, replace damaged sections, clean and repair corroded connectors, secure harness away from sharp edges and heat sources.
  8. If the short follows to a component (ECU, motor, pump), bench-test or replace that component as per manufacturer procedures.
  9. After repairs, reinstall a known-good relay and original fuses. Reconnect battery and verify supply voltage and no abnormal current draw.
  10. Clear codes, cycle ignition, and perform a functional test / road test to ensure the fault does not return. Re-scan modules to confirm.

Likely causes

  • Wiring harness chafed where it passes through body panels or near engine components
  • Relay socket pin bent or contacting chassis
  • Connector corrosion allowing conductive path to ground
  • Shorted module or actuator connected to the battery supply rail
  • Incorrect repair or modification where ground and supply were crossed

Fault status

⚠️ Status
Battery supply relay circuit short to ground detected. A low-resistance path to chassis ground on the relay supply has been found. May cause blown fuses, loss of power to affected systems, or parasitic battery drain.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B1296 B1285 B1000 B1420 B1320
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Code

B1295

FIAT B — Body

Battery supply relay circuit short to ground

Brand: FIAT
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged insulation or chafed wiring in the battery supply relay feed harness contacting chassis ground
  • Shorted relay internal coil or contacts to ground
  • Corroded or loose relay socket/connector causing low-resistance path to ground
  • Aftermarket accessory incorrectly wired to the battery supply circuit and grounded
  • Faulty components downstream creating a direct short to ground (e.g., control unit, fan motor, pump)
  • Blown or partially shorted fuse or fusible link in supply circuit

Symptoms

  • Battery drain or discharged battery
  • Intermittent or complete loss of power to systems controlled by the relay
  • Blown fuse(s) for related circuits
  • No-crank or no-start if starter/feed is on affected circuit
  • Multiple warning lights or ECU communication errors
  • Relay clicking or overheating

What to check

  • Check for stored freeze-frame or related fault codes in other modules
  • Visually inspect relay, relay socket, and adjacent wiring for damage, melting, corrosion or pin contact
  • Check fuses and fusible links for continuity and signs of overheating
  • Measure battery voltage at rest and with ignition ON
  • With ignition off, measure resistance between supply feed pin and chassis ground to detect low-resistance short
  • Use a fused jumper or test lamp in series to locate the short by pulling fuses or unplugging connectors downstream

Signal parameters

  • Battery voltage at relay supply terminal: approx. 11.5–12.8 V (key off); 12–14.5 V (engine running)
  • Relay control pin (with ignition ON and relay commanded ON): battery voltage (~12 V) or PWM depending on design
  • Relay coil resistance (typical): 50–200 ohms (varies by relay) — open circuit indicates coil failure
  • Resistance between supply feed pin and chassis ground when circuit should be open: should be very high/OL; short to ground will show low ohms (near 0–2 ohms)
  • Crank/starting condition: supply voltage should remain above ~9.5 V during cranking; large drops indicate heavy short

Diagnostic algorithm

  1. Retrieve fault memory and any related codes from all modules; note freeze-frame data and when code sets.
  2. Visually inspect the relay, fuse, relay socket, and immediate wiring. Look for melting, corrosion, pin displacement, or aftermarket splices.
  3. Check associated fuses/fusible links for continuity. Replace blown fuses only after locating cause of short.
  4. With ignition OFF, disconnect the battery negative terminal for safety if performing prolonged repairs. For short tracing, keep battery connected and use a fused test jumper or test lamp to avoid damage.
  5. Remove the battery supply relay. Measure resistance between the supply feed terminal in the relay socket and chassis ground. A low resistance indicates a short in the harness or downstream component.
  6. If a short is present, isolate the circuit by unplugging connectors or removing fuses for downstream loads one at a time while monitoring the resistance or test lamp. When the short disappears, the last disconnected module/connector is suspect.
  7. Inspect/repair the identified wiring run: repair chafes, replace damaged sections, clean and repair corroded connectors, secure harness away from sharp edges and heat sources.
  8. If the short follows to a component (ECU, motor, pump), bench-test or replace that component as per manufacturer procedures.
  9. After repairs, reinstall a known-good relay and original fuses. Reconnect battery and verify supply voltage and no abnormal current draw.
  10. Clear codes, cycle ignition, and perform a functional test / road test to ensure the fault does not return. Re-scan modules to confirm.

Likely causes

  • Wiring harness chafed where it passes through body panels or near engine components
  • Relay socket pin bent or contacting chassis
  • Connector corrosion allowing conductive path to ground
  • Shorted module or actuator connected to the battery supply rail
  • Incorrect repair or modification where ground and supply were crossed

Fault status

⚠️ Status
Battery supply relay circuit short to ground detected. A low-resistance path to chassis ground on the relay supply has been found. May cause blown fuses, loss of power to affected systems, or parasitic battery drain.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B1296 B1285 B1000 B1420 B1320
Repair manuals

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FIAT

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Code

B1295

LAND ROVER B — Body

Speaker 24

Brand: LAND ROVER
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged insulation or chafed wiring in the battery supply relay feed harness contacting chassis ground
  • Shorted relay internal coil or contacts to ground
  • Corroded or loose relay socket/connector causing low-resistance path to ground
  • Aftermarket accessory incorrectly wired to the battery supply circuit and grounded
  • Faulty components downstream creating a direct short to ground (e.g., control unit, fan motor, pump)
  • Blown or partially shorted fuse or fusible link in supply circuit

Symptoms

  • Battery drain or discharged battery
  • Intermittent or complete loss of power to systems controlled by the relay
  • Blown fuse(s) for related circuits
  • No-crank or no-start if starter/feed is on affected circuit
  • Multiple warning lights or ECU communication errors
  • Relay clicking or overheating

What to check

  • Check for stored freeze-frame or related fault codes in other modules
  • Visually inspect relay, relay socket, and adjacent wiring for damage, melting, corrosion or pin contact
  • Check fuses and fusible links for continuity and signs of overheating
  • Measure battery voltage at rest and with ignition ON
  • With ignition off, measure resistance between supply feed pin and chassis ground to detect low-resistance short
  • Use a fused jumper or test lamp in series to locate the short by pulling fuses or unplugging connectors downstream

Signal parameters

  • Battery voltage at relay supply terminal: approx. 11.5–12.8 V (key off); 12–14.5 V (engine running)
  • Relay control pin (with ignition ON and relay commanded ON): battery voltage (~12 V) or PWM depending on design
  • Relay coil resistance (typical): 50–200 ohms (varies by relay) — open circuit indicates coil failure
  • Resistance between supply feed pin and chassis ground when circuit should be open: should be very high/OL; short to ground will show low ohms (near 0–2 ohms)
  • Crank/starting condition: supply voltage should remain above ~9.5 V during cranking; large drops indicate heavy short

Diagnostic algorithm

  1. Retrieve fault memory and any related codes from all modules; note freeze-frame data and when code sets.
  2. Visually inspect the relay, fuse, relay socket, and immediate wiring. Look for melting, corrosion, pin displacement, or aftermarket splices.
  3. Check associated fuses/fusible links for continuity. Replace blown fuses only after locating cause of short.
  4. With ignition OFF, disconnect the battery negative terminal for safety if performing prolonged repairs. For short tracing, keep battery connected and use a fused test jumper or test lamp to avoid damage.
  5. Remove the battery supply relay. Measure resistance between the supply feed terminal in the relay socket and chassis ground. A low resistance indicates a short in the harness or downstream component.
  6. If a short is present, isolate the circuit by unplugging connectors or removing fuses for downstream loads one at a time while monitoring the resistance or test lamp. When the short disappears, the last disconnected module/connector is suspect.
  7. Inspect/repair the identified wiring run: repair chafes, replace damaged sections, clean and repair corroded connectors, secure harness away from sharp edges and heat sources.
  8. If the short follows to a component (ECU, motor, pump), bench-test or replace that component as per manufacturer procedures.
  9. After repairs, reinstall a known-good relay and original fuses. Reconnect battery and verify supply voltage and no abnormal current draw.
  10. Clear codes, cycle ignition, and perform a functional test / road test to ensure the fault does not return. Re-scan modules to confirm.

Likely causes

  • Wiring harness chafed where it passes through body panels or near engine components
  • Relay socket pin bent or contacting chassis
  • Connector corrosion allowing conductive path to ground
  • Shorted module or actuator connected to the battery supply rail
  • Incorrect repair or modification where ground and supply were crossed

Fault status

⚠️ Status
Battery supply relay circuit short to ground detected. A low-resistance path to chassis ground on the relay supply has been found. May cause blown fuses, loss of power to affected systems, or parasitic battery drain.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

B1296 B1285 B1000 B1420 B1320
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
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Code

B1295

Other B — Body

Battery Power Relay Circuit Short To Ground

Brand: Other
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Damaged insulation or chafed wiring in the battery supply relay feed harness contacting chassis ground
  • Shorted relay internal coil or contacts to ground
  • Corroded or loose relay socket/connector causing low-resistance path to ground
  • Aftermarket accessory incorrectly wired to the battery supply circuit and grounded
  • Faulty components downstream creating a direct short to ground (e.g., control unit, fan motor, pump)
  • Blown or partially shorted fuse or fusible link in supply circuit

Symptoms

  • Battery drain or discharged battery
  • Intermittent or complete loss of power to systems controlled by the relay
  • Blown fuse(s) for related circuits
  • No-crank or no-start if starter/feed is on affected circuit
  • Multiple warning lights or ECU communication errors
  • Relay clicking or overheating

What to check

  • Check for stored freeze-frame or related fault codes in other modules
  • Visually inspect relay, relay socket, and adjacent wiring for damage, melting, corrosion or pin contact
  • Check fuses and fusible links for continuity and signs of overheating
  • Measure battery voltage at rest and with ignition ON
  • With ignition off, measure resistance between supply feed pin and chassis ground to detect low-resistance short
  • Use a fused jumper or test lamp in series to locate the short by pulling fuses or unplugging connectors downstream

Signal parameters

  • Battery voltage at relay supply terminal: approx. 11.5–12.8 V (key off); 12–14.5 V (engine running)
  • Relay control pin (with ignition ON and relay commanded ON): battery voltage (~12 V) or PWM depending on design
  • Relay coil resistance (typical): 50–200 ohms (varies by relay) — open circuit indicates coil failure
  • Resistance between supply feed pin and chassis ground when circuit should be open: should be very high/OL; short to ground will show low ohms (near 0–2 ohms)
  • Crank/starting condition: supply voltage should remain above ~9.5 V during cranking; large drops indicate heavy short

Diagnostic algorithm

  1. Retrieve fault memory and any related codes from all modules; note freeze-frame data and when code sets.
  2. Visually inspect the relay, fuse, relay socket, and immediate wiring. Look for melting, corrosion, pin displacement, or aftermarket splices.
  3. Check associated fuses/fusible links for continuity. Replace blown fuses only after locating cause of short.
  4. With ignition OFF, disconnect the battery negative terminal for safety if performing prolonged repairs. For short tracing, keep battery connected and use a fused test jumper or test lamp to avoid damage.
  5. Remove the battery supply relay. Measure resistance between the supply feed terminal in the relay socket and chassis ground. A low resistance indicates a short in the harness or downstream component.
  6. If a short is present, isolate the circuit by unplugging connectors or removing fuses for downstream loads one at a time while monitoring the resistance or test lamp. When the short disappears, the last disconnected module/connector is suspect.
  7. Inspect/repair the identified wiring run: repair chafes, replace damaged sections, clean and repair corroded connectors, secure harness away from sharp edges and heat sources.
  8. If the short follows to a component (ECU, motor, pump), bench-test or replace that component as per manufacturer procedures.
  9. After repairs, reinstall a known-good relay and original fuses. Reconnect battery and verify supply voltage and no abnormal current draw.
  10. Clear codes, cycle ignition, and perform a functional test / road test to ensure the fault does not return. Re-scan modules to confirm.

Likely causes

  • Wiring harness chafed where it passes through body panels or near engine components
  • Relay socket pin bent or contacting chassis
  • Connector corrosion allowing conductive path to ground
  • Shorted module or actuator connected to the battery supply rail
  • Incorrect repair or modification where ground and supply were crossed

Fault status

⚠️ Status
Battery supply relay circuit short to ground detected. A low-resistance path to chassis ground on the relay supply has been found. May cause blown fuses, loss of power to affected systems, or parasitic battery drain.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

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B1296 B1285 B1000 B1420 B1320
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