B1362

Code

Other B — Body

Ignition Run/Acc Circuit Short To Ground

Brand: Other

Type: B — Body

Views: UK: 29 EN: 51 RU: 39

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Page language: EN

Causes

Damaged or chafed wiring harness in ignition run/ACC circuit
Short to ground at a connector or pin (corrosion, bent pin)
Faulty ignition switch or ACC/run switch contacts
Aftermarket accessory or device tied into ACC circuit causing a direct ground
Faulty body control module (BCM) or ignition control module internal failure
Blown or corroded fuse or fusible link associated with ACC/run circuit

Symptoms

Accessories (radio, power outlets, interior lights) do not operate in ACC or RUN
No crank or intermittent ignition issues if ACC/run feed is affected
Fuses for accessory circuits blow repeatedly
Engine may stall or fail to start if essential ignition feed is lost
Intermittent electrical faults or loss of stored settings

What to check

Read and record freeze-frame data and any additional stored codes
Visual inspection of ignition switch, steering column wiring, and fuse box for damage or corrosion
Check relevant fuses and fusible links for continuity and correct rating
Inspect for aftermarket accessories tied into ACC circuit and disconnect them
Measure voltage at ACC/run terminal with key in OFF/ACC/RUN positions
Perform continuity test from ACC/run wire to ground with ignition OFF

Signal parameters

ACC/run circuit voltage: ~0 V with key OFF, ~12 V (battery voltage) with key in ACC or RUN
Connector continuity to ground: near infinite (open) with ignition ON; low ohms indicates short
Expected circuit resistance from ignition switch to module: typically low ohms (1–5 Ω) but no continuity to chassis ground
Fuse current draw: normal standby current low; abnormal high current indicates short

Diagnostic algorithm

Verify the code: confirm B1362 is current or historic and note conditions when it set (key position, engine off/on).
Remove power if doing live wiring repairs. Inspect visually along wiring from ignition switch to fuse box/BCM for abrasion, melted insulation, or pinched sections.
With battery connected, measure voltage at the ignition switch ACC/run terminal in OFF, ACC and RUN positions to confirm correct switching (use backprobe).
If ACC/run terminal is shorted to ground (0 V when it should be 12 V), disconnect downstream consumers (stereo, amplifiers, alarm modules, aftermarket devices) and re-test to isolate.
Perform a continuity/ohm test from the ACC/run feed to chassis ground with ignition OFF. Low resistance indicates a short — trace harness sections to locate.
Wiggle test wiring while observing voltage/continuity to reproduce intermittent shorts; inspect connectors (steering column, dash, fuse box) and repair corroded pins/sockets.
If wiring and peripherals check good, test or replace the ignition switch. If ignition switch replacement does not clear the fault, inspect or communicate with the BCM/ignition control module (check for internal faults).
After repairs, clear codes, cycle key through positions and road test to ensure code does not return.

Likely causes

Wiring abrasion where harness contacts chassis or sharp edge
Ignition switch housing moisture/corrosion causing internal short
Poor repair or splice creating a ground at ACC feed
Accessory (stereo, alarm, power inverter) incorrectly wired to ground
Loose/oxidized connector at steering column or fuse box

Fault status

⚠️ Status

Ignition Run/Accessory circuit short to ground detected. The ACC/RUN feed is being pulled to ground, which can disable accessories or disrupt ignition-related circuits. Inspect wiring, connectors, ignition switch and any aftermarket loads.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 0.5-2.0 hours