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Home / DTC / B1707 — Mirror Switch R Input Shorted to Ground

B1707 — Mirror Switch R Input Shorted to Ground

Detailed page for trouble code B1707.

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22,491specific
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Code

B1707

HUMMER B — Body

Mirror Switch R Input Shorted to Ground

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

Causes

  • Broken or chafed wiring shorting to chassis ground
  • Damaged mirror switch (internal short)
  • Water or corrosion in mirror or switch connector
  • Poor or missing connector pin retention causing pin contact with ground
  • Aftermarket accessories or previous repairs that disturbed wiring
  • Short in related control module or internal module fault

Symptoms

  • Right side mirror does not respond to switch commands
  • Intermittent mirror operation or works only in one direction
  • Diagnostic trouble code B1707 stored
  • Possible mirror-related warning or reduced functionality

What to check

  • Retrieve freeze frame/CID and confirm B1707 is current or stored
  • Inspect mirror switch, mirror housing, and door harness for visible damage or corrosion
  • Check connector pins for bent, pushed-out or corroded terminals
  • Backprobe the mirror switch R input with key ON to measure voltage
  • Perform wiggle test of door harness while observing live data or voltage
  • Compare readings with left mirror/switch circuit (if available) for reference

Signal parameters

  • Key ON, engine OFF: R-input voltage typically ~9–14 V (pulled high) when not actuated; 0 V if shorted to ground
  • When switch is actuated the input may change to low (0 V) or toggle depending on circuit design; consult vehicle wiring diagram for expected behavior
  • Resistance: between R-input and chassis ground should be very high (open) with switch inactive; low (near 0 Ω) only when intentionally grounded by the switch
  • If reading 0 V with switch inactive = likely short to ground

Diagnostic algorithm

  1. Record codes and live data. Note whether B1707 is current or intermittent and test with mirror switch operated.
  2. Visually inspect door mirror, mirror glass housing, switch, and harness entry points for damage, water intrusion, or corrosion.
  3. With ignition ON (engine off), backprobe the mirror switch R-input terminal at the switch connector and at the mirror connector (if separate) and measure voltage relative to chassis ground.
  4. If voltage is ~0 V with switch inactive, disconnect the mirror connector. If voltage returns to expected level at switch side, fault is in harness/mirror. If still 0 V, fault is upstream (switch or module).
  5. Perform continuity/resistance check between the R-input wire and chassis ground with connectors disconnected. Low resistance indicates a short to ground in wiring or component.
  6. Wiggle harness through door jamb while observing voltage/continuity to reproduce intermittent shorts. Pay attention to harness sections at hinge and mirror entry point.
  7. If wiring appears intact, remove and bench-test the mirror switch or mirror actuator per service manual to confirm internal short.
  8. Repair damaged wiring (splice, replace pigtail, or replace harness section) or replace faulty mirror/switch assembly as required. Use OEM replacement parts or properly sealed connectors.
  9. After repair, clear codes and perform function test of mirror. Re-check for any reoccurrence and confirm normal signal parameters.

Likely causes

  • Wiring harness abrasion where it passes through the door hinge or near the mirror
  • Corroded or bent connector terminal at mirror or mirror switch
  • Failed mirror switch internal electronics shorting input to ground
  • Water intrusion into mirror assembly causing low-resistance path to ground

Fault status

⚠️ Status
Right mirror switch input circuit shorted to ground. Mirror may not operate; inspect wiring and switch.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1706 B1708 B1709 B1720 U0121 U0140
Repair manuals

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Code

B1707

LAND ROVER B — Body

Driver seat back switch battery

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

Causes

  • Broken or chafed wiring shorting to chassis ground
  • Damaged mirror switch (internal short)
  • Water or corrosion in mirror or switch connector
  • Poor or missing connector pin retention causing pin contact with ground
  • Aftermarket accessories or previous repairs that disturbed wiring
  • Short in related control module or internal module fault

Symptoms

  • Right side mirror does not respond to switch commands
  • Intermittent mirror operation or works only in one direction
  • Diagnostic trouble code B1707 stored
  • Possible mirror-related warning or reduced functionality

What to check

  • Retrieve freeze frame/CID and confirm B1707 is current or stored
  • Inspect mirror switch, mirror housing, and door harness for visible damage or corrosion
  • Check connector pins for bent, pushed-out or corroded terminals
  • Backprobe the mirror switch R input with key ON to measure voltage
  • Perform wiggle test of door harness while observing live data or voltage
  • Compare readings with left mirror/switch circuit (if available) for reference

Signal parameters

  • Key ON, engine OFF: R-input voltage typically ~9–14 V (pulled high) when not actuated; 0 V if shorted to ground
  • When switch is actuated the input may change to low (0 V) or toggle depending on circuit design; consult vehicle wiring diagram for expected behavior
  • Resistance: between R-input and chassis ground should be very high (open) with switch inactive; low (near 0 Ω) only when intentionally grounded by the switch
  • If reading 0 V with switch inactive = likely short to ground

Diagnostic algorithm

  1. Record codes and live data. Note whether B1707 is current or intermittent and test with mirror switch operated.
  2. Visually inspect door mirror, mirror glass housing, switch, and harness entry points for damage, water intrusion, or corrosion.
  3. With ignition ON (engine off), backprobe the mirror switch R-input terminal at the switch connector and at the mirror connector (if separate) and measure voltage relative to chassis ground.
  4. If voltage is ~0 V with switch inactive, disconnect the mirror connector. If voltage returns to expected level at switch side, fault is in harness/mirror. If still 0 V, fault is upstream (switch or module).
  5. Perform continuity/resistance check between the R-input wire and chassis ground with connectors disconnected. Low resistance indicates a short to ground in wiring or component.
  6. Wiggle harness through door jamb while observing voltage/continuity to reproduce intermittent shorts. Pay attention to harness sections at hinge and mirror entry point.
  7. If wiring appears intact, remove and bench-test the mirror switch or mirror actuator per service manual to confirm internal short.
  8. Repair damaged wiring (splice, replace pigtail, or replace harness section) or replace faulty mirror/switch assembly as required. Use OEM replacement parts or properly sealed connectors.
  9. After repair, clear codes and perform function test of mirror. Re-check for any reoccurrence and confirm normal signal parameters.

Likely causes

  • Wiring harness abrasion where it passes through the door hinge or near the mirror
  • Corroded or bent connector terminal at mirror or mirror switch
  • Failed mirror switch internal electronics shorting input to ground
  • Water intrusion into mirror assembly causing low-resistance path to ground

Fault status

⚠️ Status
Right mirror switch input circuit shorted to ground. Mirror may not operate; inspect wiring and switch.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1706 B1708 B1709 B1720 U0121 U0140
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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Code

B1707

MITSUBISHI B — Body

Flasher open

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

Causes

  • Broken or chafed wiring shorting to chassis ground
  • Damaged mirror switch (internal short)
  • Water or corrosion in mirror or switch connector
  • Poor or missing connector pin retention causing pin contact with ground
  • Aftermarket accessories or previous repairs that disturbed wiring
  • Short in related control module or internal module fault

Symptoms

  • Right side mirror does not respond to switch commands
  • Intermittent mirror operation or works only in one direction
  • Diagnostic trouble code B1707 stored
  • Possible mirror-related warning or reduced functionality

What to check

  • Retrieve freeze frame/CID and confirm B1707 is current or stored
  • Inspect mirror switch, mirror housing, and door harness for visible damage or corrosion
  • Check connector pins for bent, pushed-out or corroded terminals
  • Backprobe the mirror switch R input with key ON to measure voltage
  • Perform wiggle test of door harness while observing live data or voltage
  • Compare readings with left mirror/switch circuit (if available) for reference

Signal parameters

  • Key ON, engine OFF: R-input voltage typically ~9–14 V (pulled high) when not actuated; 0 V if shorted to ground
  • When switch is actuated the input may change to low (0 V) or toggle depending on circuit design; consult vehicle wiring diagram for expected behavior
  • Resistance: between R-input and chassis ground should be very high (open) with switch inactive; low (near 0 Ω) only when intentionally grounded by the switch
  • If reading 0 V with switch inactive = likely short to ground

Diagnostic algorithm

  1. Record codes and live data. Note whether B1707 is current or intermittent and test with mirror switch operated.
  2. Visually inspect door mirror, mirror glass housing, switch, and harness entry points for damage, water intrusion, or corrosion.
  3. With ignition ON (engine off), backprobe the mirror switch R-input terminal at the switch connector and at the mirror connector (if separate) and measure voltage relative to chassis ground.
  4. If voltage is ~0 V with switch inactive, disconnect the mirror connector. If voltage returns to expected level at switch side, fault is in harness/mirror. If still 0 V, fault is upstream (switch or module).
  5. Perform continuity/resistance check between the R-input wire and chassis ground with connectors disconnected. Low resistance indicates a short to ground in wiring or component.
  6. Wiggle harness through door jamb while observing voltage/continuity to reproduce intermittent shorts. Pay attention to harness sections at hinge and mirror entry point.
  7. If wiring appears intact, remove and bench-test the mirror switch or mirror actuator per service manual to confirm internal short.
  8. Repair damaged wiring (splice, replace pigtail, or replace harness section) or replace faulty mirror/switch assembly as required. Use OEM replacement parts or properly sealed connectors.
  9. After repair, clear codes and perform function test of mirror. Re-check for any reoccurrence and confirm normal signal parameters.

Likely causes

  • Wiring harness abrasion where it passes through the door hinge or near the mirror
  • Corroded or bent connector terminal at mirror or mirror switch
  • Failed mirror switch internal electronics shorting input to ground
  • Water intrusion into mirror assembly causing low-resistance path to ground

Fault status

⚠️ Status
Right mirror switch input circuit shorted to ground. Mirror may not operate; inspect wiring and switch.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1706 B1708 B1709 B1720 U0121 U0140
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MITSUBISHI

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

B1707

Other B — Body

Seat Driver Recline Rearward Switch Circuit Short To Battery

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

Causes

  • Broken or chafed wiring shorting to chassis ground
  • Damaged mirror switch (internal short)
  • Water or corrosion in mirror or switch connector
  • Poor or missing connector pin retention causing pin contact with ground
  • Aftermarket accessories or previous repairs that disturbed wiring
  • Short in related control module or internal module fault

Symptoms

  • Right side mirror does not respond to switch commands
  • Intermittent mirror operation or works only in one direction
  • Diagnostic trouble code B1707 stored
  • Possible mirror-related warning or reduced functionality

What to check

  • Retrieve freeze frame/CID and confirm B1707 is current or stored
  • Inspect mirror switch, mirror housing, and door harness for visible damage or corrosion
  • Check connector pins for bent, pushed-out or corroded terminals
  • Backprobe the mirror switch R input with key ON to measure voltage
  • Perform wiggle test of door harness while observing live data or voltage
  • Compare readings with left mirror/switch circuit (if available) for reference

Signal parameters

  • Key ON, engine OFF: R-input voltage typically ~9–14 V (pulled high) when not actuated; 0 V if shorted to ground
  • When switch is actuated the input may change to low (0 V) or toggle depending on circuit design; consult vehicle wiring diagram for expected behavior
  • Resistance: between R-input and chassis ground should be very high (open) with switch inactive; low (near 0 Ω) only when intentionally grounded by the switch
  • If reading 0 V with switch inactive = likely short to ground

Diagnostic algorithm

  1. Record codes and live data. Note whether B1707 is current or intermittent and test with mirror switch operated.
  2. Visually inspect door mirror, mirror glass housing, switch, and harness entry points for damage, water intrusion, or corrosion.
  3. With ignition ON (engine off), backprobe the mirror switch R-input terminal at the switch connector and at the mirror connector (if separate) and measure voltage relative to chassis ground.
  4. If voltage is ~0 V with switch inactive, disconnect the mirror connector. If voltage returns to expected level at switch side, fault is in harness/mirror. If still 0 V, fault is upstream (switch or module).
  5. Perform continuity/resistance check between the R-input wire and chassis ground with connectors disconnected. Low resistance indicates a short to ground in wiring or component.
  6. Wiggle harness through door jamb while observing voltage/continuity to reproduce intermittent shorts. Pay attention to harness sections at hinge and mirror entry point.
  7. If wiring appears intact, remove and bench-test the mirror switch or mirror actuator per service manual to confirm internal short.
  8. Repair damaged wiring (splice, replace pigtail, or replace harness section) or replace faulty mirror/switch assembly as required. Use OEM replacement parts or properly sealed connectors.
  9. After repair, clear codes and perform function test of mirror. Re-check for any reoccurrence and confirm normal signal parameters.

Likely causes

  • Wiring harness abrasion where it passes through the door hinge or near the mirror
  • Corroded or bent connector terminal at mirror or mirror switch
  • Failed mirror switch internal electronics shorting input to ground
  • Water intrusion into mirror assembly causing low-resistance path to ground

Fault status

⚠️ Status
Right mirror switch input circuit shorted to ground. Mirror may not operate; inspect wiring and switch.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B1706 B1708 B1709 B1720 U0121 U0140
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