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2teendaughters 09-21-2019 04:38 PM

Right side head lights dim.
 
When lights are turned on the right side is very dim. Both high and low beam. When switched between high and low the opposite seems to happen. Getting 12vdc and as near as I can tell the ground is intact. Has the headlight switch taken a dump? or is there another possible check I can look into.

fdryer 09-21-2019 05:05 PM

Re: Right side head lights dim.
 
Which car?

2teendaughters 09-21-2019 05:17 PM

Re: Right side head lights dim.
 
Sorry 2001 sl2

fdryer 09-21-2019 05:35 PM

Re: Right side head lights dim.
 
I'm not near service manuals for posting and going on memory but if I'm not mistaken, there are two wiring schematics, one for manually turning on headlights and the daytime running lights using a complicated wiring scheme. The drl circuit may affect manual lighting but not the other way. Drl uses a relay downstream from fuse(s), controlled by the bcm. Check all headlight fuses for looseness, drl relay and wiring in general. I'm not sure if your '01 SL2 uses parking or high beams for daytime running lights and complicates where to check. Some GM drl circuits use a combination of serial and parallel wiring along with adding a resistor in other drl circuits. :dizzy:

If this problem exists only in drl or manual lighting mode, the problem can be narrowed down. There may be wiring diagrams posted in other threads and you can use circuits from 2000 and up.

2teendaughters 09-21-2019 06:43 PM

Re: Right side head lights dim.
 
[QUOTE=fdryer;2306952]I'm not near service manuals for posting and going on memory but if I'm not mistaken, there are two wiring schematics, one for manually turning on headlights and the daytime running lights using a complicated wiring scheme. The drl circuit may affect manual lighting but not the other way. Drl uses a relay downstream from fuse(s), controlled by the bcm. Check all headlight fuses for looseness, drl relay and wiring in general. I'm not sure if your '01 SL2 uses parking or high beams for daytime running lights and complicates where to check. Some GM drl circuits use a combination of serial and parallel wiring along with adding a resistor in other drl circuits. :dizzy:

If this problem exists only in drl or manual lighting mode, the problem can be narrowed down. There may be wiring diagrams posted in other threads and you can use circuits from 2000 and up.[/QUOTE]

Fuses checked and relay replaced. These were my first thoughts. Only the right side is affected. Haven't seen a wire schematic. Wondering if circuit is split Left and Right in the headlight switch? There isn't any indication in the (PDM) power distribution module. Stumped non the less.

SRGW 09-21-2019 07:22 PM

Re: Right side head lights dim.
 
1 Attachment(s)
[B][SIZE="3"]Does this help :)

1995 SL1 236,300 2005>2018
1997 SL1 78,100 2014>????;)
CHECK YOUR OIL!! :)
[/SIZE][/B]

Waiex191 09-21-2019 08:37 PM

Re: Right side head lights dim.
 
I don't have a schematic in front of me but if anything was split it would be the grounding block. By the way, cool avatar and cool you have 3 saturns. Now you just need one for you!

2teendaughters 09-21-2019 11:12 PM

Re: Right side head lights dim.
 
[QUOTE=SRGW;2306962][B][SIZE="3"]Does this help :)

1995 SL1 236,300 2005>2018
1997 SL1 78,100 2014>????;)
CHECK YOUR OIL!! :)
[/SIZE][/B][/QUOTE]

Lights are split from side to side. Power and ground. Is that what you see?

SRGW 09-22-2019 12:08 PM

Re: Right side head lights dim.
 
1 Attachment(s)
[b][size="3"]1995 sl1 236,300 2005>2018
1997 sl1 78,100 2014>????
Check your oil!! [attach]57098[/attach][/size][/b]

Claybury 09-23-2019 04:51 PM

Re: Right side head lights dim.
 
Sounds like a high resistance connection somewhere. You won't find that by measuring voltage at the source.
Look at the connectors for corrosion or heat damage. Wires for corrosion or burning. Pull the bulbs and look for corrosion at the contacts.
Check the ground connections for corrosion or being loose.If all else fails try new bulbs.

theunpaidBill 12-02-2019 11:39 PM

Re: Right side head lights dim.
 
So did you ever find the issue? My 02 SC2 is showing the same symptom.

TomM96 12-06-2019 02:03 AM

Re: Right side head lights dim.
 
On my 2000 SW2 the forward right lamp ground (a foot behind the headlamp fixture on top right upper frame rail) had several badly corroded terminals inside the connector, which is open to weather.

Claybury (above) has very good suggestions...
When the bright is dimmer than the dim, may indicate bad ground limiting adequate power for normal ops.


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