Find Out if the Volkswagen Jetta Headlight Assembly is Faulty
The headlight assembly of a vehicle is one of the most important parts because it allows every driver to cruise safely down the road. Plus, it's a standard operating procedure to switch the headlights on when dusk sets in or when you drive through a tunnel. This way, you can avoid any vehicular accidents and you'll be noticed by the other drivers on the street. However, it's inevitable for the Volkswagen Jetta headlight assembly to fail. Eventually, it will and you'll have to get a replacement. But first, you have to know if it's faulty. Here are some troubleshooting tips that you can use to find out.
Vibration of headlight assembly while driving
When driving and you sense that the headlight assembly is vibrating, it could mean that the projector or reflector is disconnected. This will entail you having to open the assembly. The high-beam side of the projector or reflector of the headlight assembly is connected by a single sliding-friction attachment point, which can be found at the adjustment mechanism. If great force was applied when you reconnected the electrical plug to the high-beam bulb, it can cause the projector or reflector to slip off its attachment. It's not necessary to replace the assembly itself, but you can go to an expert mechanic to have this repaired.
A common reason why the headlight assembly fails is because the headlight bulb is no longer functioning. To check if it's faulty, turn on the headlights and find out which side is not working. Have this replaced immediately because it's quite difficult to drive with only one functioning headlight.
Busted wiring harness
If you've replaced the headlight bulb, but the assembly still refuses to function, it could mean that the wiring harness is damaged. Check the engine compartment fuse box and take out the fuse that works on the headlight circuit that no longer lights up. If the fuse is discolored, replacing it would be necessary.
No power coming through the wiring harness
To check if there's power coming through the wiring harness, you'll need to inspect it with a voltmeter. Connect it to the negative and positive terminal on the battery. If there's no power at all, you'll have to replace the wiring harness so that the headlight assembly would be able to function.