daytime lights

[stefy1066]

Since you guys know all the answers.....How come my daytime running kights quit all the sudden? I have a 96 Suburban. 147000 miles, runs great. Have had a few minor problems, always able to fix. now this. The lights have always worked. now nothing front or back unless I turn all my lights on. any idea's????

[777stickman]

1. Check DRL fuse. 2. Parking brake on inhibits DRL's.
3. DRL module and diod (seperate) under dash.
4. Rear lights are not a function of the DRL system. They only come on when light switch is on.

98 K2500 7.4..............Steve

[snatit56]

I'm having the same problem. I've checked the 1st two, could you explain the 3rd one a little more

[777stickman]

Originally Posted by snatit56

I'm having the same problem. I've checked the 1st two, could you explain the 3rd one a little more

1st of all, my apologies for omitting the DRL relay in item 3. The relay is located in bottom center of the convenience center(firewall left of steering column). The module is a black aluminum case w/fins located left of center a/c oulet below column. The diode(D203) is located just to the right of column. I've found some errors in this '98 GM service manual, so keep that in mind. To check the diode: 1) key OFF. 2) remove relay. 3) check 12v at G6(top left hole) to gnd. If power is there, diode is good. Quick relay check assuming power @ G6: 1) install a 20 Amp fused jumper between G6 and H4(bottom right). 2) Turn key ON. 3) Check headlights. If ON replace relay, if still OFF, probably the module.
This is just a quick component check and assumes no open or shorted wiring. The DRL Troubleshooter has 22 steps. Spent 2 hrs researching this for you guys and I hope it helps........Steve

[Pondering]

Found this in the online manual for your year Suburban. Thought I'd pass it along. Hope it helps.

When necessary, you may turn off the Automatic
Headlamp System and the Daytime Running
Lamps (DRL) feature by following these steps.
When the system is turned off, the headlights will not
automatically come on when it becomes dark outside.
As with any vehicle, you should turn on the regular
headlamp system when you need it.
1. Turn the ignition to RUN.
2. Press the DOME OVERRIDE button four times
within six seconds. After the fourth press of the
button, a chime will sound informing you the system
is off. The system will revert back to the automatic
mode when the ignition is turned off and on again.
3. To return to the automatic mode, push the
DOME OVERRIDE button four times within
six seconds (the chime will sound), or turn the
ignition off and on again.
As with any vehicle, you should turn on the regular
headlamp system when you need it.

I have a 2001 and I accidentally found out how to turn off the DRL and i looked in the manual to see if this was a published feature.

[stefy1066]

Where is the Dome Override button? Is it the "Dome Lights Off" button by the headlamp switch?

[Pondering]

Online owners manuals can be found at www.mygmlink.com

[h2012]

I have a 2004 Suburban. My daytime running lights no longer comes on, instead my headlights now comes on day and night. I can turn the headlights off during the day but the DRL's do not come on. I replaced the bulbs without success. Any ideas on how to get the DRL's working again?