1999 Cadillac STS engine will not turn over

1999 CADILLAC STS
158,000 MILES • V8 • FWD • AUTOMATIC
Avatar
MKUKLA
  • MEMBER
  • 1 POST
I have 12.6 volts at battery, car started fine yesterday. Today, won't even click, but I have power to all accessories. Tried jump starting, nothing happened. I think it may be in one of the start or ignition relays. Is there a way to check them rather than starting to replace them one by one? Does this model Caddy have any other notorious quirks besides the head gasket issues?
Jul 17, 2010 at 3:04 AM
Avatar
FACTORYJACK
  • ✓Experienced Mechanic
  • 4,159 POSTS
There is a two wire connector at the front of the rear bank of cylinders that runs under the intake. There is a large gauge purple wire in this, that is your starter signal wire. Disconnect it and probe it with a test light while turning to crank position. If it lights every time, you need a starter.
Jul 17, 2010 at 11:37 AM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle