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Power windows and sunroof stop working. 25A fuse on the back…

Customer Question
Power windows and sunroof...

Power windows and sunroof stop working

Mechanic's Assistant: Have you checked the fuses?

25A fuse on the back side of fuse box is good, but no [power getting to it

Mechanic's Assistant: What is the model/year of your Pontiac?

2004 Grand Prix GTP Comp G

Mechanic's Assistant: Are you fixing your Grand Prix yourself? What have you tried so far?

1. had to find the fuse on the back side of fuse box....Done 2. Sawpped the 25a fuce with power seat fuse

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

3. removed the cover of the fuse and ran power to it and the windows worked so power is not getting to the fuse box

Submitted: 7 months ago.Category: Pontiac
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Answered in 4 minutes by:
11/26/2017
Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago
Gary
Gary, Pontiac Technician
Category: Pontiac
Satisfied Customers: 18,018
Experience: 15 years GM master tech/15 years ASE master
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Welcome! My name is ***** ***** I will do my best to assist you with this problem.

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Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

if you remove the RAP relay in that fuse box do 2 of the 4 terminals in the fuse box the relay plugs into show 12 volts ?

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Customer reply replied 7 months ago
are you there?
Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

ok that leaves 2 terminals left when you start the car up will one of the last 2 terminals show a ground when you start the car up ?

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Customer reply replied 7 months ago
I checked it with the Key in the on position
Customer reply replied 7 months ago
should I check it with the key OFF?
Customer reply replied 7 months ago
then with the car running?
Customer reply replied 7 months ago
Not a big deal, I'll do both.....one second...
Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

the last 2 terminals one is supposed to be a ground to turn on the relay which then the relay sends 12 volts out the last terminal to power those circuit breakers

we just need to be sure the BCM is turning on that relay which it does with ground

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Customer reply replied 7 months ago
Still hot...
1. key off - both 12v
2. key in run position - both 12v
3. engine running - both 12v
Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

test the OTHER 2 terminals that do NOT have power one of then should be a ground..the 2 that have 12 volts are good

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Customer reply replied 7 months ago
20a Sun Roof fuse has NO Power, all other fuses in fuse box show power.....FYI
Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

the RAP relay is what powers the fuses that are showing no power

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Customer reply replied 7 months ago
Hold on. you wanted me the check the other 2 terminals.....for ground
Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

yes with the car running

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Customer reply replied 7 months ago
ok
with key off 1 has groundwith key on both hads ground
Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

ok at this point it seems that relay is bad

the BCM is telling it to send power out of it

replacing that relay should fix this issue you are having

please dont forget to rate me here at Justanswer

you can always get me back for FREE for any follow up any time with this question even after you rate me here at Justanswer

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

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Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

please dont forget to rate me here at Justanswer

you can always get me back for FREE for any follow up any time with this question even after you rate me here at Justanswer

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

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Customer reply replied 7 months ago
all good
Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

ok

please dont forget to rate me here at Justanswer

you can always get me back for FREE for any follow up any time with this question even after you rate me here at Justanswer

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

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Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

please dont forget to rate me here at Justanswer

you can always get me back for FREE for any follow up any time with this question even after you rate me here at Justanswer

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

Ask Your Own Pontiac Question
Pontiac Mechanic: Gary, Pontiac Technician replied 7 months ago

how are you making out ?

please dont forget to rate me here at Justanswer

you can always get me back for FREE for any follow up any time with this question even after you rate me here at Justanswer

if you have any questions please ask as i do not get credit for my work until you rate me here at Justanswer

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