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2004 XLR won't start not battery or fuses

MattBlueXLR

Member
Joined
Sep 8, 2020
Messages
6
Location
Waynesville, Ohio
My XLR/V(s)
2004 Xenon Blue XLR
My 2004 XLR wont start. Key FOB's are recognized, but when I push the start button nothing happens. Yes, I'm pushing the brake pedal as well. The engine does not try to crank, the battery does not make a click. Interior lights work fine, and about 5 seconds after hitting the start button, all of the gauges on the instrument panel come to life as though the car has started. So I tested the battery and found it was low on CCA, so I replaced it. Nothing changed, still won't start. Hooked up scanner, but found no errors. So my mechanic and I traced fuses for fuel pump, starter, etc. (by the way, we do hear the fuel pump when the car tries to start). swapped a couple relay modules in the fuse box, to confirm that starter and fuel pump relays were working properly.

If I toggle the engine start button downward to turn on accessories, I can move the shift lever to Neutral, but the car won't start in that position either. This is confirm that the transmission lockout is functioning properly.

From other threads I've read, it sounds like it could be the starter, but since you have to remove the top of the engine to get to it, I was looking for any other results that someone might have found in a similar situation.

Thanks for your responses in advance. Matt
 

mickeytee

Seasoned Member
Joined
Apr 5, 2017
Messages
759
Location
North Atlanta
could still be the brake switch l. I would check it and make sure the lights are working when you press the brake to start. I sort of press the brake to start anything but not sure its even required? Is the fob working the windows and lock buttons?
 

MattBlueXLR

Member
Joined
Sep 8, 2020
Messages
6
Location
Waynesville, Ohio
My XLR/V(s)
2004 Xenon Blue XLR
Fobs are working and I'm not getting a FOB error when I hit the "Start" button. How do you check the brake switch?
 
Joined
Sep 26, 2014
Messages
45
Location
Jupiter, FL
My XLR/V(s)
2005 Black XLR, 2013 XTS Platinum Black Diamond Tricoat
Matt, I had these same problems on my 2005. I am not mechanical at all, so just telling you what happened with my car. Had everything checked and had these problems on and off for 1.5 years. I changed these fuses and relays at box under the hood, and have never had the problem again. Fuses I changed: 7, 26, 29, 30, 31, 32, 43 and 44. The last 2 are relays. I changed every fuse or relay that had anything to do with starter, ignition or battery. Just thought I would tell you because changing the starter is so expensive.
 

Bill S.

Seasoned Member
Joined
Jun 26, 2018
Messages
186
Location
Jensen Beach, FL
My XLR/V(s)
2006 V, Raven Black with Shale interior
Matt, I had these same problems on my 2005. I am not mechanical at all, so just telling you what happened with my car. Had everything checked and had these problems on and off for 1.5 years. I changed these fuses and relays at box under the hood, and have never had the problem again. Fuses I changed: 7, 26, 29, 30, 31, 32, 43 and 44. The last 2 are relays. I changed every fuse or relay that had anything to do with starter, ignition or battery. Just thought I would tell you because changing the starter is so expensive.
Changing my starter now . What a job. What a drag. Will recommend a hoist.

Bill
 

MattBlueXLR

Member
Joined
Sep 8, 2020
Messages
6
Location
Waynesville, Ohio
My XLR/V(s)
2004 Xenon Blue XLR
Matt, I had these same problems on my 2005. I am not mechanical at all, so just telling you what happened with my car. Had everything checked and had these problems on and off for 1.5 years. I changed these fuses and relays at box under the hood, and have never had the problem again. Fuses I changed: 7, 26, 29, 30, 31, 32, 43 and 44. The last 2 are relays. I changed every fuse or relay that had anything to do with starter, ignition or battery. Just thought I would tell you because changing the starter is so expensive.
I try that. Cheaper than replacing the starter.
 

MR Roadster

Member
Joined
Oct 9, 2020
Messages
18
Location
pawleys island SC
My XLR/V(s)
2005 xlr
Check your suspension module in the trunk make sure all plugs are securely in place. Check tan/tan with black stripe gmlan wires are all connected. When the gmlan wires are disconnected the car will not start. Use Tech II and try to connect to suspension module.
 

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