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After replacing battery there is no power going to starter from switch

Tiny
MYCUNNINGHAM
  • MEMBER
  • 1999 CADILLAC ELDORADO
  • 4.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I replaced battery and it sparked. But now no power going to starter from switch. The warning screen is black and the A/C heater lights don't come on.
Monday, October 21st, 2019 AT 6:27 PM

8 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good evening,

Did you install the cables correctly? The red cable goes to the positive side and the black goes to the negative side.

If you installed it backward, you could have damaged many modules from the voltage surge.

There is a main fuse in the fuse block which may have failed. Hopefully, it is the only damage.

Roy
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Monday, October 21st, 2019 AT 6:56 PM
Tiny
MYCUNNINGHAM
  • MEMBER
  • 5 POSTS
Yes they are correct to my knowledge. I have tested all fuses in both fuse boxes. What main fuse are you talking about?
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Monday, October 21st, 2019 AT 7:33 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You have 4 fuse blocks in the car. You have the underhood, left half, right half and rear fuse blocks.

When you tested the fuses, did you verify voltage at the fuses? A visual is not a good test. You must test for power at the fuses.

https://www.2carpros.com/articles/how-a-car-fuse-works

Roy
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Monday, October 21st, 2019 AT 7:40 PM
Tiny
MYCUNNINGHAM
  • MEMBER
  • 5 POSTS
Yes, tested them with a test light and with key on. You said 4 fuse blocks and only mentioned 3 which I have checked those you mentioned. Because I only found one in trunk.
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Monday, October 21st, 2019 AT 7:45 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Under the hood, there are relay boxes that have a couple of fuses as well.

Does anything have power in the car? Do any lights come on at the dash?

Roy
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-1
Monday, October 21st, 2019 AT 7:48 PM
Tiny
MYCUNNINGHAM
  • MEMBER
  • 5 POSTS
The check engine light comes on and that is it. Also the trunk and fuel door buttons in center don't work. Funny which doesn't help but radio does works.
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Monday, October 21st, 2019 AT 7:54 PM
Tiny
MYCUNNINGHAM
  • MEMBER
  • 5 POSTS
Anymore clues for me?
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Tuesday, October 22nd, 2019 AT 6:16 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Okay,

I attached a power distribution diagram. I highlighted a 50 amp fuse. Can you verify power on both sides for me?

Roy
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Wednesday, October 23rd, 2019 AT 4:18 AM

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