Archive & reference hub
MK3 / A70 markets
Manuals, parts, data

Troubleshooting assistant

Pick a problem area, choose the symptom, then follow the remedy links or step-by-step TSRM procedure.

Diagnostic codes
Searching in 1990 USDM TSRM.
Areas /Theft deterrent J — theft deterrent horn and light retractor control relay circuit
Step-by-step TSRM procedure

Theft deterrent J — theft deterrent horn and light retractor control relay circuit

Follow the theft deterrent system flowchart from BE-96.

BE-96
Current check

Disconnect computer connector and check that stop

Disconnect computer connector and check that stop the theft deterrent horn blows and/or headlight and taillight flash.
Yes

Replace computer.

Replace computer.
No

Short circuit in light retractor control relay or theft deterrent horn circuit.

Short circuit in light retractor control relay or theft deterrent horn circuit.