Question about 1999 GMC Jimmy
Checked all fuses, replaced relay, resurfaced ground and bolt behind passenger light underneath batter tray. Have taken relay out and jumped pin 30 to 86 and know the dimmer switch is good because I can get regular head lights on or off from the switch. When I click the high beams on multi-function switch, high beams will not stay on and does no illuminate on the dash. When I hold the high beams on, the passenger headlamps all go off but the drivers side high beams works (have tested pass. bulb, its good). I am looking for help tracking the problem(s) down. I have 2 older multi-function switches that i had replaced before along with dimmer switch. Also had taken the Jimmy into have this problem fixed two years ago. As far as I was told, a short that also shorted my other multi-function switches (but the high beams did work on those during the 1st time I had a problem). Also pulled the fuse box under the hood to look for signs of a short or burnt wires on the underside of the fuse box. I hate to spend another $150 on a multi-function switch on the column if its just going to get fried. Help!!!
Headlights control by headlamp driver module relay to the BCM and the light sensor on dash next to the winshield defrost vents.headlights also control by high beam relay.
Posted on Nov 18, 2013
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Posted on Jan 02, 2017
You have a short to ground somewhere in the drl-fog lamp circuit. Check for obvious wiring connector or wiring to drl & fog lamps. check wiring for pinched or broken wires coming from sockets. If you don't find problem, you can trace wiring from lamps to main harnesses and hopefully find source of short.
hope this helps.
Posted on Mar 02, 2010
SOURCE: i have a 99 gmc
check the multi function switch.where the wires go into the switch may be melted.the low beam feed wire is probably melted off.try tilting the steering wheel.you may find they come on at a curtain spot.this is a common problem.happened on my 2000 chevy truck.
Posted on Nov 25, 2010
The problem is likely your multi purpose signal light switch. If you take the lever and move it from hi to low beam will the low beams come on? It is common for this multi purpose (real expensive ) switch to fail after a period of time! The steering wheel may have to be removed, to change it. The air bags will also need to be disabled so as not to active them while removing the switch.
Posted on Mar 19, 2011
Tips for a great answer:
Oct 26, 2016 | 1997 GMC Jimmy
Sep 23, 2012 | 2002 Honda Accord
[Information] For a 2002 Toyota Camry, the Daytime
Running Lights (DRL) operate utilizing the High Beams (inner Lamps closer to
the center of the vehicle front) at a reduced power.
[The troubleshooting process:] Review the Owner's Manual and ensure the test
configuration matches the following criteria:
1. According to the 2002 Toyota Camry Owner's Manual (Check your Owners Manual):
"The DRL system will make your headlights come on at a reduced brightness when:
The light switch s in the "DRL" position.
The ignition is on with the engine running.
The headlight switch is off.
The parking brake is released."
2. Set the Test Conditions according to Step 1 above.
3. Check the headlight bulbs to ensure they are not
burned out. If one burns out, there is a fair chance that the other would have burned
out at the same time. Replace as necessary.
In this case, if the high beams operate, the DRLs should also operate.
4. Test the system, ensuring the step 1 conditions are set. (Engine running, Multi-function Switch on Turn Signals in "DRL" position, headlight switch off (repeating what the manual says -- it should be obvious that in the "DRL" position, the headlight switch should be off / do not have the switch positioned to "High Beam"), and the Parking Brake "off").
5. If DRL lights do not work, check the engine compartment Fuse and Relay Box. there is a 5 Amp DRL fuse -- replace it with the spare. Test (step 4).
6. If it does not work, swap around or replace relays -- there are three (3). Any one of them could be bad (stuck or burned out). Test (step 4).
7. Other less likely possible issues could be that the Multi-function Switch is broken or a connection / wire is broken. [Beyond the scope of this process.]
My problem was that the test configuration did not have
the engine running and parking brake off - Step 1. Problem solved with much
thought, repetitive tests on the vehicle and going back to the basics -- what
does the Owner's Manual say and where are the applicable fuses and relays
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