Starter will not start the engine when it is hot?

Tiny
RANDALL VAN OORT
  • MEMBER
  • 1999 DODGE RAM
  • 9.0L
  • V10
  • 4WD
  • AUTOMATIC
  • 200,000 MILES
When the starter is cold, it will start. Drive until the motor is warm, then shut it off, and it will not restart until it is completely cold again, about 10 hours later. It is currently the height of summer heat. I replaced the battery, the starter, the battery cables, and starter relay. Won't start with a jump when it's hot, either. Sometimes it will click, other times no noise at all.
Sunday, August 7th, 2022 AT 5:12 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,144 POSTS
Yep, there is a starter motor relay that I would replace here is the location in the diagrams below and I have included the starter wiring diagrams so you can see how the system works. Check out the diagrams (below). Please let us know what you find.
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Monday, August 8th, 2022 AT 12:12 PM

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