Lights electrical problem

hoj · Dec 10th, 2022, 16:30

Changed both headlights the other day (non xenon) all is fine apart from the n/s side light is dimmer than the other side when headlight switch is on 0 but when not on 0 both bulbs are fine and bright

One n/s rear bulb was out so changed it and now no n/s rear bulbs are in apart from reverse and brake

Flashers/main beam won’t work at all no matter what setting the switch is on

Auto electrician looking at it Monday How much more is this going to cost me now?
M O Ts due next week as well

XC70Bob · Dec 12th, 2022, 11:07

If both the indicators and the high beam are not working then my first check would be the stalk switches , if a common point of failure and you can often just disassemble the switch and clean the contacts to get them working again.

look at this site https://www.swedespeed.com/threads/h...ch-lag.482841/
but I would not recommend using a power tool to clean the pcb simple contact cleaner will remove most of the dirt and old grease and a simple clean with a pence rubber will remove any stubbed dirt.

hoj · Dec 16th, 2022, 08:08

Been told it’s probably the ECM as the stalk is showing as putting out power but it’s not reaching the bulb
Anyone else had this?
Thinking of just installing a direct on off toggle switch
Indicators and everything else work fine

XC70Bob · Dec 16th, 2022, 09:44

That will not be possible as the indicator relay is internal to the CEM, as suggested on your other thread to talk to volvo diagnostic about getting the CEM checked.

https://www.volvoforums.org.uk/showthread.php?t=329468
this is why having to threads on the same problem is never a good idea you just end up going round in circles ending up with the same suggestion on each thread.

stuart bowes · Dec 16th, 2022, 11:41

Theoretically anything is possible if you throw enough wiring, solder or crimps, switches, relays and hours of your life at it

but it would be a total bodge job and though yes you could power the lights with your own circuitry you'd more than likely throw up at the very least a main headlights fault on the dash, which would be pretty annoying to have there all the time and would probably at least raise some eyebrows at the MOT station, if not an actual fail

Dec 10th, 2022, 16:30	#1
hoj Member Last Online: Jun 21st, 2024 21:18 Join Date: Jan 2021 Location: Bury	Lights electrical problem Changed both headlights the other day (non xenon) all is fine apart from the n/s side light is dimmer than the other side when headlight switch is on 0 but when not on 0 both bulbs are fine and bright One n/s rear bulb was out so changed it and now no n/s rear bulbs are in apart from reverse and brake Flashers/main beam won’t work at all no matter what setting the switch is on Auto electrician looking at it Monday How much more is this going to cost me now? M O Ts due next week as well

Dec 16th, 2022, 11:41	#5
stuart bowes trying to be helpful Last Online: Today 09:31 Join Date: Aug 2020 Location: Dagenham	Theoretically anything is possible if you throw enough wiring, solder or crimps, switches, relays and hours of your life at it but it would be a total bodge job and though yes you could power the lights with your own circuitry you'd more than likely throw up at the very least a main headlights fault on the dash, which would be pretty annoying to have there all the time and would probably at least raise some eyebrows at the MOT station, if not an actual fail __________________ V70 '01 auto petrol 2.4 (140) 72k ------------------------- mini project - link Last edited by stuart bowes; Dec 16th, 2022 at 11:45.

Dec 12th, 2022, 11:07	#2
XC70Bob XC70 SE lux D5 Last Online: Jun 9th, 2024 11:53 Join Date: Jan 2011 Location: Mansfield, notts	If both the indicators and the high beam are not working then my first check would be the stalk switches , if a common point of failure and you can often just disassemble the switch and clean the contacts to get them working again. look at this site https://www.swedespeed.com/threads/h...ch-lag.482841/ but I would not recommend using a power tool to clean the pcb simple contact cleaner will remove most of the dirt and old grease and a simple clean with a pence rubber will remove any stubbed dirt.

Dec 16th, 2022, 08:08	#3
hoj Member Last Online: Jun 21st, 2024 21:18 Join Date: Jan 2021 Location: Bury	Been told it’s probably the ECM as the stalk is showing as putting out power but it’s not reaching the bulb Anyone else had this? Thinking of just installing a direct on off toggle switch Indicators and everything else work fine

Dec 16th, 2022, 09:44	#4
XC70Bob XC70 SE lux D5 Last Online: Jun 9th, 2024 11:53 Join Date: Jan 2011 Location: Mansfield, notts	That will not be possible as the indicator relay is internal to the CEM, as suggested on your other thread to talk to volvo diagnostic about getting the CEM checked. https://www.volvoforums.org.uk/showthread.php?t=329468 this is why having to threads on the same problem is never a good idea you just end up going round in circles ending up with the same suggestion on each thread.

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