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Headlight Problem
- Nova2k7
- Senior Member
- Posts: 2199
- Joined: Mon Oct 31, 2011 2:59 pm
- Location: Halifax - West Yorkshire
Headlight Problem
Ok so i had a sidelight out on the drivers side. stuck a new bulb in and it still wont work, sometimes the light on the dash is out and other times its not. all the wires have been checked and seem fine. my mechanic friend seems to think its something to do with the ECU still thinking the bulb has gone so wont sent power to it. also the indicator stays on sometimes?
- cj10jeeper
- Lifer
- Posts: 17846
- Joined: Fri Jun 22, 2007 11:50 am
- Location: Lichfield, England
Re: Headlight Problem
You don t specify halogen or xenon.
In any event easiest is to swap light units side to side and see we're the fault lies.
If xenon swap over ballasts and igniters too, to eliminate item at a time.
In any event easiest is to swap light units side to side and see we're the fault lies.
If xenon swap over ballasts and igniters too, to eliminate item at a time.
Jaguar F-Type 3.0 Supercharged V6 S, Stratus Grey, LSD, Active Exhaust, CF wheels, Performance brakes, Sports seats and mods ongoing
Gone but not forgotten Z4 3.0i SE Roadster ///M front, Red ///M leather seats, Aero sills
Gone but not forgotten Z4 3.0i SE Roadster ///M front, Red ///M leather seats, Aero sills
- Nova2k7
- Senior Member
- Posts: 2199
- Joined: Mon Oct 31, 2011 2:59 pm
- Location: Halifax - West Yorkshire
Re: Headlight Problem
ill be honest i dont know which they are, they are just the crappy normal ones on a 2003 E85 3.0SEcj10jeeper wrote:You don t specify halogen or xenon.
In any event easiest is to swap light units side to side and see we're the fault lies.
If xenon swap over ballasts and igniters too, to eliminate item at a time.
- bcworkz
- Senior Member
- Posts: 1740
- Joined: Wed May 04, 2011 10:56 pm
- Location: ǝɹǝɥ ƃuoɹʍ s,sƃuıɥʇǝɯos
Re: Headlight Problem
The "ECU" (would be the lighting module actually) could not control power to individual lamps, only the entire circuit. There's no reason to cut power to a dead lamp anyway, the resulting open circuit (broken filament) does a good job of that by itself. Either the new bulb is faulty (swap lamps as CJ suggests) or the wiring is faulty, despite outward appearances. There's a fair chance corrosion inside the connector is causing a dodgy connection, if I were to make a wild guess.
"The cause of most problems are solutions" (06 3.0si, sport pkg)