having just read the latest on my headlight thread, this new issue has come up about running off one relay, is there a good chance it could burn out? and how about putting an in-line fuse on that wire you fitted, would that be an idea?

I think what Andy ment was that running both lights off of 1 relay might burn it out, putting an in line fuse in the cable wont stop it burning out, what i would try suggesting is removing the power from the drivers side light and re connecting it to the origonal loom, leaving the earth connected to the passenger light. see if you lights still work then, it may just be the earth if thats the case all should be well.......if that is the case then remove the power cable altogether......

 

If you need talking through it give me a call.

 

Neil

its not going to be an earth fault

 

if you look at the circuit diagram and the reported symptoms, it can't be

 

its either :

the +12 supply to the relay

the headlight switches

the wire from the headlight switches to the relay

the wire from the relay to the point where it splits to the dipped and full beam lights

 

when one relay does not provide power, the working relay provides power to its bulb and also all 3 other bulbs in series, for this to happen the grounds need to be ok

 

use a multimeter to check there is +12v at both the coil and the switch terminals of the relay socket

 

if no 12v , check relay socket has clean contacts and fuses are ok

if yes 12v , then insert a piece of (1mm minimum) wire across the switch terminals of the relay (insert it sharply as it will probably spark) then turn lights on.

 

 

if the lights now work then the fault is either with the headlight switches or the wire from the switches to the relay (i dont have the circuit diag in front of me but i'm thinking wire unlikely as why use 2 wires when 1 would do)

 

if the lights still dont work then the fault is between the relay and the point where the wire splits to go to the full and dipped lights ( as i said before can't remember where this is, it may be at the lights or it may be in the wiring at the fuse box)

Having seen the wiring in the engin bay tracing the wiring is going to bea nightmare for any one, there must be 20 - 30 cut wires that have been taped together...... it's not a pretty sight......

 

I did reccomend a new loom but not sure if they do a seperate loom or if it'll all need replacing......... or a £2-300 bill from an auto electrician to repaire it all......

 

i would say it would tgake a good few hours to repaire and replace the wiring in the engine bay around the fuse/relay box and the lighting circuit.....