intermitant running lights

Asked by Talos Nov 30, 2013 at 07:53 AM about the GMC Sierra 2500HD

Question type: Maintenance & Repair

i have a 94 GMC sierra 2500 4x4. my problem is my running lights are not working all the
time they come on when they want to with the switch turned on. the switch and all lights
are new i cannot find the problem. Any help to resolve this would be appreciated as my
second truck  a 93 chevy 1500 is doing the same thing.

8 Answers

30,495

Is your e-brake pedal/switch loose, e-brake light on. The e-brake shuts the running lights off.

1 people found this helpful.

no its not loose the lights are intermitant whether the brake is on or off

30,495

OK. Running lights. Are you refering to daytime running lights (low beams on during the day, e-brake to bypass) or your park lights, front marker/signal below the head lights. Park lights on the front only work with the switch. Lows work with the running or head lights. If the switch and bulbs are new I would start at the sockets and work the wiring back to the ground. Might be loose or rusty. If the issue was on the hot side it would usually be a fuse or broken wire which 98% of the time it would not come back at all.

30,495

A multi meter comes in handy (even a cheap one) Read the resistance from the ground termial in the plug back to the neg on the battery. Your looking for a reading as close to zero as possible. If the reading looks good try moving the wiring to see if it changes.

front parking lights , the cab lights ( on the roof ) , my dash lights , tail lights, and the license plate lights. are the lights affected . i will try the multi meter tomarrow.

30,495

Wow all. That steers me back to a power issue. If they all are affected it's power because more than two of the lights you mentionede have separate grounds and odds are that they wont fail at the same time. Was it a new swictch or a used switch? Other than bulbs that's the highest failure point I've had with mine. I would check the wiring and fuse terminal around the fuse box. Reach behind and move the wires see if you can locate the issue.

found the problem the switch was faulty , getting another one. thanks for the help.

30,495

Been there. Had a new one, in which I had to wedge something above the "P" to rotate the contacts inside counter-clock wise to get it to work. I've used the cheaper ones from LMC and they aren't bad.

Your Answer:

Sierra 2500HD

Looking for a Used Sierra 2500HD in your area?

CarGurus has 2,200 nationwide Sierra 2500HD listings starting at $3,000.

Postal Code:

CarGurus Experts

  • #1
    Gilbert Tijerina
    Reputation
    490
  • #2
    BoholMark
    Reputation
    460
  • #3
    Marcus Victorius
    Reputation
    410
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Chevrolet Silverado 2500HD
33 Great Deals out of 1,683 listings starting at $3,000
Used GMC Sierra 1500
132 Great Deals out of 8,251 listings starting at $3,000
Used Ford F-250 Super Duty
24 Great Deals out of 786 listings starting at $4,290
Used GMC Sierra 3500HD
30 Great Deals out of 1,271 listings starting at $3,000
Used RAM 2500
67 Great Deals out of 2,535 listings starting at $6,995
Used Chevrolet Silverado 1500
214 Great Deals out of 8,009 listings starting at $1,500
Used Ford F-150
314 Great Deals out of 13,742 listings starting at $3,800
Used Dodge RAM 2500
30 listings starting at $9,900
Used Ford F-250
6 listings
Used Ford F-350 Super Duty
54 Great Deals out of 1,480 listings starting at $7,000
Used Toyota Tundra
33 Great Deals out of 984 listings starting at $10,698
Used Chevrolet Silverado 3500HD
24 Great Deals out of 1,014 listings starting at $3,000
Used GMC Yukon
14 Great Deals out of 981 listings starting at $3,000
Used GMC Sierra 1500 Limited
23 Great Deals out of 258 listings starting at $22,999
Used RAM 1500
490 Great Deals out of 20,790 listings starting at $3,500

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.