I have a 67 Mustang which I recently bought as a daily driver project. I now have the Mustang on the road (inspected and all) however I have an electrical problem where something is drawing about 3.3 amps draining the battery very quickly. My workaround is to disconnect the cables at this point.
I’ve done the following and have a multi-meter:
Any ideas on next steps?
Thanks,
Patrick
I’ve done the following and have a multi-meter:
- New solenoid – needed one anyhow as the old solenoid was failing. Tested it – no problems
- New Voltage Regulator. The old VR was not supplying charge. If I pull the VR the amps go to 0. But I’m not sure this is telling me much.
- Checked battery cables for good connection. Cleaned all connections at the starter, block and battery.
- Pulled the harness at the rear lights – still shows the amp draw
- Pulled horn – still shows a draw. BTW – if I beep the horn sparks fly and I can smell wire burning. I know something is wrong here. I think the horn is also connected to the headlamp switch? If I beep the horn the headlights go out. This is something new and possibly caused by my tinkering trying to find the root of the problem.
- Pulled the headlamp switch – still shows a draw.
- Pulled all fuses – still shows a draw
- Tested with the alternator not connected – still shows a draw
- Not sure what to do next. I have a sneaky feeling the headlamp switch could be the culprit but really have no direct proof. I know some of the wires to the headlamp harness were loose and one wire was not connected. I reconnected and still see the issue.
Any ideas on next steps?
Thanks,
Patrick