So I've had an intermittent start issue with my Brickyard '03. Starting last summer, on hot days the starter sometimes wouldn't spin when the key is turned to start. Might take 4 or 5 tries, then vroom, cranks right up. Haven't seen it much until the last week or so (10+ days of over 100 degree days in Birmingham...), and it's gotten much, much worse. To the point that it just wouldn't start last night and had to get a push to roll start it.

So, spent today troubleshooting and determined it is the starter relay, located on the IPDM/ER (fuse box behind the battery). The starter relay is gray in color but is interchangeable with several other relays that are black, including one for foglights, which I don't have.

According to the service manual, these relays are not removable, but obviously they are. The part number is almost unreadable, but I think it is either:

ACM33221
or
ACM53221
or
ACM332Z1
or
ACM532Z1

I googled and yahoo'd those numbers with no luck. Any help would be greatly appreciated!

Andy

 

Starter relay ACM33221

 

Thanks for the follow-up (even though it's ~6 years old!). I did get the correct relay and solved the issue.

 

I've been having the exact some problem. I would like to know where you found that grey starter relay..ACM33221. No one seems to stock it or be able to get it (including the dealer). When I switch it out with one of the black ACM 33201's, the engine spins and fires right up like a champ. As soon as I put the gray one back in...not even a click. Any help or info on where I can get that grey relay is much appreciated.