1999 Cadillac STS engine will not turn over

Tiny
MKUKLA
  • MEMBER
  • 1999 CADILLAC STS
  • V8
  • FWD
  • AUTOMATIC
  • 158,000 MILES
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?
Saturday, July 17th, 2010 AT 10:04 AM

1 Reply

Tiny
FACTORYJACK
  • 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.
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Saturday, July 17th, 2010 AT 6:37 PM

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