Why are all the lights on my trailer not working?
Another possibility is that if the trailer has a lot of running lights the combined power draw may be too much for the tow package wiring to handle. To test this you can disconnect some of the lights that use the running light circuit and if the others start working then that was indeed the issue.
Are there brake lights that work on a 1998 GMC Seirra?
39 people found this helpful. 1998 gmc seirra brake lights turn signals and reverse light all work. Marker lights do not work. Brake light only with with head ligh switch off. I’ve cleaned and replaced all grounds changed the whole rear harness replaced bulbs boards does anyone have any ideas?
Why are the tail lights on my GMC Sierra 1500 not working?
If you pull the headlight switch out and visually inspect the plug itself you will probably find that the withe wire and the brown wire are discolored. (Due to its intermittent connection they heats up) The female connector on both of those wires have lost one side of the clip that slides on to the headlight switch.
Why are my rear running lights not working?
My rear running lights are the only lights not working. I’ve checked the fuses, replaced the circuit boards, replaced the bulbs, resurfaced the ground and tested the sockets. The rear running light plug is the only plug not getting power.
Why are the brake lights not working on my GMC Yukon?
If your Yukon’s brake light switch checked out ok, and there are no brake lights illuminating at all, inspect the wiring harness going from the brake switch to the bulbs themselves. There could be an issue with frayed wiring, wiring that has lost its ground, or a short/open situation.
Why are the running lights on my Silverado truck not working?
My silverado blew the fuse for the trailer running lights in this under hood fuse block. The truck’s running lights will work, but the trailer won’t if the fuse is blown.
Are there any running lights on my truck?
I doubt the problem is on the trailer because he says it is on every trailer he hooks to. It has to be the truck. Check the truck’s brown wire at the plug, then push the tester through the insulation and see if the wire has current before it enters the plug…Is this a factory trailer package?? Or an add on??….
Another possibility is that if the trailer has a lot of running lights the combined power draw may be too much for the tow package wiring to handle. To test this you can disconnect some of the lights that use the running light circuit and if the others start working then that was indeed the issue.
What’s the best way to fix a trailer light?
The best way to solve your trailer lights wiring issue is to eliminate possible problems one-by-one until you have pinpointed the root cause of the malfunction. It is possible that one of the bulbs on your trailer burned out.
How do I troubleshoot a trailer wiring problem?
If you are using a battery charger, connect the negative cable to the white wire pin (ground) on the trailer plug and connect the positive battery charger lead to the yellow wire pin. If you are using a tow vehicle, turn the left turn signal on. The left turn light should come on. If it doesn’t, first check the bulb, then the wiring to it.
When do you need to check your trailer lights?
Most fixes are quick and easy. If your utility trailer is starting to show its age, you no doubt have had problems with your lights. Properly functioning trailer lights are a must for safety, so check your lights every time you use your trailer.
Why is my trailer running lights not working?
Because the most common reason for trailer lights not working properly is a bad or missing ground, check the trailer’s and truck’s ground connection first. A poor ground often becomes the culprit when only some lighting functions are working and when lights go out when you push the brake pedal.
How do you check trailer lights?
To test your trailer plugs, turn your multimeter to volt DC settings, then connect the black probe to the negative terminal and your other multimeter probe to one of the positive pins, and turn on the light that is controlled by that pin. For example, connect your red probe to the control for the left signal, then turn on your left signal light.
Why do my tail lights not work?
Tail lights do not work when the headlight switch is activated. As noted above, different automotive manufacturers have different tail lamp bulb configurations. In many cases when the lights don’t work when the headlight is turned on, it is caused by a burnt out or short circuited tail lamp bulb.
How do you troubleshoot trailer wiring?
To troubleshoot your trailer wiring, connect a jumper wire to the connector pins and the continuity tester to the system’s sockets. A continuity test helps you see if there are any broken wires. Select a color of wire in the socket, and find the same one on the connector front.
Can a trailer light work except for one function?
Trailer lights work except for one function: brake, right turn, left turn, or tail. Harness wires are not connected to vehicle correctly/securely. ( Plug-In Only) A set of connectors is not seated together properly or is not making a good connection.
What to do if your trailer light breaks?
Use the circuit tester to see if current is going to the light fixture itself. Begin with checking the harness that goes into the fixture in question and move all the way back to the tow vehicle to find the point where the circuit breaks. You may need to clean the brass terminals using steel wool or wire brush to restore a good connection.
Most fixes are quick and easy. If your utility trailer is starting to show its age, you no doubt have had problems with your lights. Properly functioning trailer lights are a must for safety, so check your lights every time you use your trailer.