On my 1965 C30 truck, sometimes (not every time) I receive what I assume is a spike in the electrical system when I apply my brakes. It will occur at least once in a five minute trip, but I can hit the brake pedal a dozen times without any issues.

This spike will knock out the radio, thus resetting everything. I have one of those new radios where one power lead goes to a full time positive to keep the memory and the other to a keyed switch. I also believe this spike blows the heater fuse if the heater is on.

Where should I start to troubleshoot this issue? Has anyone else run into this? Is this a grounding issue? I just remembered that the spike also occurred (not all the time) when I put on my day-time running lights.

I hate electrical issues... Can anyone help?


1960 Chevy Apache (C10)
1965 Chevy C30 Dump Truck
1966 Chevy C30 Tow Truck