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Headlight come on , replace dimmer bulb but light comes on and goes back out. could it be relay or switch itself. The light and fog light work on driver side but not passenger side. IThis problem occur when I turn on the headlights. I replaced the right dimmer switch. Took out te fuse and relay and replaced them back in. Don't know if you can test relay or not. AS I said the driver side is working.
Re: Headlight come on , replace dimmer bulb but light...
It sounds as though there is a loose connection on the passenger side. Check socket and switch bulbs from driver and passenger side. hope this helps tim
Thank you, I will get someone to check it or else I'm going to have to take it to an electrical shop. Will let you know when I get it done.Thank you, I will get someone to check it or else I'm going to have to take it to an electrical shop. Will let you know when I get it done.
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as you checked already fuses, relays and bulbs there must be something wrong with the light switch in the dashboard.
- either a loose connector or worn out contacts. first remove the switch and spray some WD-40 or similar contact spray into the connector from behind - if that does not help you have to replace the light switch with a new one...
There are several things that can cause your fog lamps to not work. The fog lamp circuits need to be diagnosed. Your entire fog lamp circuit can be tested at the plug for the fog lamp relay located n the relay box.
PIN 5 on the relay should have battery power at all times. This power comes from Fuse #43 (15 Amp) in the fuse and fusible link box in the engine compartment. If there is power at this pin, the fuse and the circuit between the fuse and the relay is good.
PIN 3 on the relay goes to the fog lamp bulbs. There should be continuity to ground through the bulbs on this pin. If you have continuity to ground, connecting a jumper wire between PIN 5 and PIN 3 should make the fog lamps come on unless there is a short circuit to ground, which will cause Fuse #43 to blow. If there is no continuity to ground on this pin, the problem is either that BOTH fog lamp bulbs are burned out or there is a break in the wire between the relay and the bulbs.
PIN 1 Is the battery power for the primary coil in the relay. This power comes from the headlamp switch and power is only supposed to be present here when the headlamps are on and the dimmer switch is on LOW BEAM. If power is not present at this pin, the problem is a bad headlamp switch or an open circuit between the headlamp switch and the relay.
PIN 2 Is the control circuit for the primary relay coil. The control circuit should have continuity to ground when the fog lamp switch is set to the ON position. If there is no continuity to ground with the fog lamp switch on, the problem is a faulty fog lamp switch, an open between the relay and the fog lamp switch, or an open between the fog lamp switch and ground E37 (right front of engine compartment) and ground F7 (left rear of engine compartment) Please note: This circuit has redundant grounds....if one ground is not making good contact, the other ground can still make the circuit work.
PIN 4 on the relay is not used.
If all of the circuits/pins are working as described above, replace the relay.
That is pretty much it... That is all you really need to know to get your fog lamp circuits diagnosed. Let me know if you need further assistance.
If your high beams come on only when you hold the lever, and you have no headlights otherwise, i would suggest it has to be the dimmer switch that is faulty. First, though, use a test light to see if you have power to the low beams. Just pull the bulb out, and test in the socket. If you have power there, the problem is just the bulbs. No... they didn't both burn out at once, but you don't notice until they are both gone. You meet cars all the time with one headlight. When the second one goes, they over think the problem.
The fact that your dimmer switch has to be held to get any headlights would lead me to believe it's the dimmer switch that is faulty.
The relay has nothing to do with the tail lights, but replacing the switch sounds like a good idea. There's a nut holding it in place, see http://www.skandix.de/en/spare-parts/electrics/switches/switch-headlight/1027524/ to get an idea of the construction. And the price. This is not worth fiddling about unreliable workarounds... In addition, if fuses 15 and/or 16 burn frequently there might be a problem with the tail light cabling.
Headloght switch or dimmer HI-Lo switch is what I would look at. The power to the headlights goes through the dimmer switch before it gets to the bulbs. No relay!
If you have daytime running lights but when you turn on your regular headlight on they do not come on. Take the bottom of your steering column off (Two Small Screws) and look at the back of your turn/dimmer switch make sure that the light blue wire is connected. The wires will break off after years of raising and lowering your steering column.
Click on the link.
This is for 03 jetta gls
There are fuses for left and right low beams. Headlights on low beam, use a test light, see if voltage on fuse circuit? If no voltage that will lead us back to dimmer switch or problem with wiring circuit from dimmer switch.
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