Detecting a Faulty Cadillac Deville Headlight Assembly
The last thing you want to experience whenever you are in the middle of a drive at night is having a faulty and trippy Cadillac Deville headlight assembly. Problems on this part could prove too costly as you are left blind while you try to navigate through the dark. Without enough visibility, you might end up in a fatal accident you could've avoided. Before something like this happens, it's important that you replace bad headlights and other bad parts at once. Here are some of the signs that tell you have something wrong with your Deville's headlight assembly.
The lights of your headlight assembly should be controllable by the simple setting of the switch to the on or off position. If it appears like the bulbs want to light up or die on their own, your car may have a problem with the circuit breaker: a part that's responsible for sending and stopping the flow of electricity to the parts that need it. Try replacing this first before you go to the more demanding task of working on the headlight assembly.
Let's hope a problem like this happens when you're parked in the garage. Old bulbs are the first suspect. If these are still new, check the fuse box for any bad or burnt connections. Relays may have gone bad as well.
High beam only
Even if you turn on the high beams on your headlight assembly, other lights such as turning, parking, and running lights should still work. The cause of other lights dying while you have high beams revolves around a faulty fuse. If replacing this doesn't solve anything, the issue may be in a faulty mechanism with the switches in the steering column.
Assuming the components directly connected to the Deville's headlight assembly are new and fresh, dimming lights shouldn't be a problem. If it still happens, the cause of such incidents lies on other parts such as the battery terminals and fuses. Clean any dirt off the lines and make sure the fuses are as tight as possible to ensure that electricity travels without any restrictions.