z driver 88t

I was having a non-start issue with the starter not turning when engaged at the igniton. I figured 3 possible problems:

1. Ignition switch, starter relay, or starter.

I checked for voltage at the starter relay across pin plugs 85/86 and got battery voltage when I turned the key to start so figured the ignition swith was working.

I pulled the relay and tested it to make sure applying voltage across pins 85/86 would yield continuity across pins 30 and 87 and it did.

So deducing that the switch and relay were good, figured it must be the starter.

Just to double check, after reading an old post on starters I decided to use a jumper at the relay terminal connecting pin plugs 30 and 87 and it fired right up.

So now I'm back to thinking its an issue with the ignition switch or relay, even though bot tested fine. I happened to have a brand new ignition switch and relay and swapped them both in with no effect.

Thoughts? I'm stumped.

z driver 88t

Update:
Seems to be an issue with the plug connection at the terminal. I made 4 wire connectors with spades and plugged each spade directly into the terminal with the other end of the wire connected to the corresponing post of the relay. The purpose was to be able to measure actual voltage and continuity on the relay itself as it was installed and working (or not working).

Car started right up fine, so I'm thinking it may be a loose termial connection at the relay board itself. I'll be able to pull the board next weekend to check the back and make sure the plug connections are good.

Amazing resources by using the search function on this board made trouble shooting pretty straight forward.

rbrtmchl

Hopefully you have found and solved the problem. Have you gone through the car and cleaned all of the critical grounds? And gone through the CE panel and cleaned all of the fuse and relay contacts? The only other item that comes to mind is there are a lot of posts here about problems with the braided ground strap from the negative battery post to the body. The ground strap can corrode underneath the plastic sheathing. Any of these problems can cause a poor connection and result in problems like you have seen.

z driver 88t

The grounds have been cleaned, but after this issue the CE panel is next on my to-do list once the weather warms up a little. I have a feeling that there is a slight connection issue at that relay location that will become evident once I pull the panel.