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Username Post: 2002 Trailblazer no running (parking) lights        (Topic#355347)
Brian D from NJ 
Senior Member
Posts: 597
Brian D from NJ
Loc: Riverside, New Jersey
Reg: 04-28-04
02-22-19 06:32 PM - Post#2760517    

Replaced my tail light lens because they are in really bad shape. Went back to the original looking ones.

As far as I can remember I had running lights (or parking lights) with the old ones. I've had the new ones in for about 10 days.

Just noticed tonight that I don't have running lights. WTF. Drove home avoiding the police, as best I could. Like I said they have been in for about 10 days.

Got home, tested turn signals - good. Four way flashers - good. Backup lights - good. But NO running lights.

So I put the OLD SET back in and again no running lights. Again, I have no idea they have not been working. It's not something you notice everyday.

Did some research and checked the manual and saw fuses #14 and #17 in the underseat fuse box has fuses for the Left and Rear Parking Lamps (as they put it).

Has anyone else run into this? I hope I'm on the right track with the fuses.

BTW the wiring at each light is in good shape. I think if one set of wires was bad a couple others would be bad, but they aren't.

Thanks in advance.

Just because your car/truck was "Made In America" doesn't mean it's American made... think about it. Buy American First.


 




Shepherd 
Frequent Contributor
Posts: 1814

Loc: Lake George, NY
Reg: 11-11-15
02-23-19 08:44 AM - Post#2760557    
    In response to Brian D from NJ

No mention if the fuses are bad?



 
Brian D from NJ 
Senior Member
Posts: 597
Brian D from NJ
Loc: Riverside, New Jersey
Reg: 04-28-04
02-23-19 01:20 PM - Post#2760567    
    In response to Shepherd

It was dark (and cold) in my garage, New Jersey winter, you know. And am work right now. I will check them tonight. As far as I know they are #14 and #17 in the fuse box under the second row seat. Everything else works fine.

Just because your car/truck was "Made In America" doesn't mean it's American made... think about it. Buy American First.


 
gchemist 
Senior Chevytalk Moderator
Posts: 24893
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
02-24-19 05:35 AM - Post#2760620    
    In response to Brian D from NJ

Do brake lights work? Third brake light work? The brake switch may be bad. I'm not familiar with wiring. If primary wiring goes through the brake switch, the problem could be there.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles


 
Brian D from NJ 
Senior Member
Posts: 597
Brian D from NJ
Loc: Riverside, New Jersey
Reg: 04-28-04
02-24-19 07:33 AM - Post#2760627    
    In response to gchemist

Yes, everything is as normal, except the running lights.

Just because your car/truck was "Made In America" doesn't mean it's American made... think about it. Buy American First.


 
Brian D from NJ 
Senior Member
Posts: 597
Brian D from NJ
Loc: Riverside, New Jersey
Reg: 04-28-04
02-24-19 08:45 AM - Post#2760633    
    In response to Brian D from NJ

OK here is something out of Bizzarro World. I checked the fuses - good. Made sure the bulbs were seated - good. Then I thought what would happen I swapped the running lights with the turn signal light? BAM! running lights work and turn signals function. I don't know what difference swapping made, but they all work now.

Just because your car/truck was "Made In America" doesn't mean it's American made... think about it. Buy American First.


 
gchemist 
Senior Chevytalk Moderator
Posts: 24893
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
02-24-19 01:16 PM - Post#2760656    
    In response to Brian D from NJ

Swap the fuses between turn signals and running lights? Corrosion on fuse can stop them from working. I've fixed a few mysterious non working lights by cleaning off fuses. That's how fixed the third brake light on my '95 Jimmy. It was probably the first time it was removed since it was built. The fuse was all corroded. In high humidity areas, fuses should be cleaned with a brush or replaced often.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles


 
Brian D from NJ 
Senior Member
Posts: 597
Brian D from NJ
Loc: Riverside, New Jersey
Reg: 04-28-04
02-24-19 05:45 PM - Post#2760696    
    In response to gchemist

gchemist, I might have made a confusing statement. I swapped the bulbs, not the fuses. Again what difference this made, I have no ides. Anyway it's fixed.

Just because your car/truck was "Made In America" doesn't mean it's American made... think about it. Buy American First.


 
gchemist 
Senior Chevytalk Moderator
Posts: 24893
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
02-25-19 04:57 AM - Post#2760744    
    In response to Brian D from NJ

Oh, that works too! Different bulb sizes matter! If they are the same size, same thing. Corrosion on contacts can cause problems.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles


 
toro455 
"4th Year" Silver Supporting Member
Posts: 546
toro455
Loc: Western NY
Reg: 06-15-02
03-10-19 12:49 PM - Post#2761746    
    In response to gchemist

I had a license plate bulb which wasn't lighting and so I pulled it and it tested ok. I put it back in and it would only work if I applied pressure to the side of it. It was one of the bulbs where a looped wire serves as the contact on the bulb. I realized it just was't making good contact despite looking normal. I added some solder to the wire (on the bulb itself) to make it fit a little tighter and no trouble after that.

Maybe your running light socket is more sensitive to fit and possibly the other bulb just fits better? It could also be removing and installing a couple of times removed come oxidation on the terminals. Anyway glad you have it sorted.

When I was first reading the thread it made me think of some of the GM vehicles which came out with day time running lights. It seems like the first generation lit both the front and back but a few years after they introduced them I noticed some of the newer vehicles had only front lights on when the daytime running lights were activated. My 03 GMC Sonoma daytime running lights shut off when you signal and then return after the signal is cancelled. I bought the truck new and it's always been like that. GM does some quirky things.

Scott



 




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