Intermittent No-Crank Condition

[markinms]

Intermittent no-crank condition. Sometimes it'll start, other times it won't.

I've replaced the key tumbler, ignition switch, starter relay, and transmission neutral safety switch. Battery is fully charged. No improvement.

I get power to the starter relay when key is turned to the "start" position. Verified with a test light.

I'm currently by-passing the ignition switch. I've installed a push button starter switch connected to 12V and run straight to the starter relay. Now I just turn the key to the "run" position and push the starter button I installed.

I'd like to get this fixed correctly. Any ideas or suggestions would be greatly appreciated. Thanks!
Mark

 

[renton]

i see it's v8 swap so tracking down the issue could be hard since the wiring will be different then the stock wiring diagrams. For what it's worth my friend did the push button ignition in his truck for years and liked it.

 

[Eddo Rogue]

My Bronco did this. I was never able to figure it out. It was probably under the dash however, because stomping the brake pedal somehow got it to crank. Sometimes I would just jump it with a flat blade at the relay.

 

[markinms]

i see it's v8 swap so tracking down the issue could be hard since the wiring will be different then the stock wiring diagrams. For what it's worth my friend did the push button ignition in his truck for years and liked it.

I'm still using the stock BII wiring harnesses. Did some splicing for the V8 swap. Nothing that would interfere with the starting system.