Electrical gremlins in my C2

[John P.]

I was able to go from a no start in my 1965 L79 convertible to good performance by ultimately changing to a new AC Delco starter,
new plugs points condenser coil etc. I also changed the bulkhead connectors as I found a loose pin. The engine harness had been changed to a new one Approx1-2 years ago. Lately I had notice intermittent loss of turn signals. After the new bulkhead connectors I found no radio, wipers, nor turn signals working.

I ordered and installed a new fuse panel, changed all of the connectors , reattached and was able to reuse the dash harness wires, which seemed fine, might be a replacement harness from 20 years ago.

I still have no wipers, turn signals, nor radio. I checked the connector to the rear and cleaned those connectors. I verified that the
7-8 pin crescent shaped double connector under the dash seems tight.

in reviewing the Doc Rebuild wiring diagrams, I cannot project a likely scenario for this combination of problems. Anyone have a suggestions?

Thanks as always.

[David H.]

Re: Electrical gremlins in my C2

... reattached and was able to reuse the dash harness wires....

John

Have you disconnected any of those components (e.g. wiper motor) from your wiring harness and tested their operation? (Hook up leads directly (with fuse) from your battery.) If components work, you may have corrosion issues (resistance) internal to your harness.

Link below is to a "voltage drop" test scenario - example in this case using a starter for demonstration.

Point being, testing circuits under load to find problem source. Many "voltage drop" test information videos, but this one is a simple example of finding a problem where all your other electrical tests don't find any issues.

Dave

Diagnosis and Understanding- Voltage Drop - Bing video

[John P.]

Re: Electrical gremlins in my C2

That was a helpful video.

As it turns out, I went through basic verification of connectors. The main problem was at the crescent connector under the dash. Seems all in order.

Im not sure the diagrams explain those particular issues, but I'll take it.

[Frank D.]

Re: Electrical gremlins in my C2

I'm not near my schematics but do those circuits share a ground ? Maybe to the one to the Z-bar ?

[John P.]

Re: Electrical gremlins in my C2

The problem seemed to be the incoming blue wire at the crescent connector. It doesn't seem that one wire would affect all of those systems, but I reconnected at all pertinent locations and we seem to be ok now..