850R - PNP/Inhibitor Switch

sye73 · Oct 15th, 2023, 22:22

Hi - Can anyone please advise/help me with a question regarding my 855R? I've noticed my reverse lights are inoperative and I'm wondering if this could be because of a faulty PNP Switch? I've checked the bulbs and all are fine; the car also drives well with no gear change/selection issues. Can a faulty Inhibitor Switch only effect the reverse lights, or would it also impact other things?

Thanks

classicswede · Oct 18th, 2023, 22:31

It is controlled by the PNP switch and a common issue https://www.volvoforums.org.uk/showthread.php?t=35868

sye73 · Oct 19th, 2023, 08:52

Thanks for your reply.
I understand the pnp switch is quite a common issue, but I was hoping to find out whether a faulty switch might only effect the reverse lights, or would it also impact other things? The vehicle drives fine and changes up/down the auto box without issue

Cheers

classicswede · Oct 19th, 2023, 19:52

That thread discusses that the reverse light switch is the common problem without anything else being wrong and that part is repairable if you want to try that rather than replacing

sye73 · Oct 19th, 2023, 20:34

Ah, understood - Thanks.
I've tried opening the link within the thread but as the other poster mentions it appears to be old/broken,
Given the problems that seem to crop up when trying to repace the contacts it, looks like it might be better to buy a new pnp switch all together: do you happen to know if the aftermarket ones fit properly and are reliable as I believe the OEM units are NLA.

Cheers

Oct 15th, 2023, 22:22	#1
sye73 Senior Member Last Online: Apr 16th, 2024 19:59 Join Date: Dec 2003 Location: London View Photos By: sye73	850R - PNP/Inhibitor Switch Hi - Can anyone please advise/help me with a question regarding my 855R? I've noticed my reverse lights are inoperative and I'm wondering if this could be because of a faulty PNP Switch? I've checked the bulbs and all are fine; the car also drives well with no gear change/selection issues. Can a faulty Inhibitor Switch only effect the reverse lights, or would it also impact other things? Thanks

Oct 18th, 2023, 22:31	#2
classicswede Trader Volvo in my veins Last Online: Today 09:10 Join Date: Dec 2004 Location: Anglesey	It is controlled by the PNP switch and a common issue https://www.volvoforums.org.uk/showthread.php?t=35868 __________________ http://www.classicswede.org www.classicswede.co.uk

Oct 19th, 2023, 19:52	#4
classicswede Trader Volvo in my veins Last Online: Today 09:10 Join Date: Dec 2004 Location: Anglesey	That thread discusses that the reverse light switch is the common problem without anything else being wrong and that part is repairable if you want to try that rather than replacing __________________ http://www.classicswede.org www.classicswede.co.uk

Oct 19th, 2023, 08:52	#3
sye73 Senior Member Last Online: Apr 16th, 2024 19:59 Join Date: Dec 2003 Location: London View Photos By: sye73	Thanks for your reply. I understand the pnp switch is quite a common issue, but I was hoping to find out whether a faulty switch might only effect the reverse lights, or would it also impact other things? The vehicle drives fine and changes up/down the auto box without issue Cheers

Oct 19th, 2023, 20:34	#5
sye73 Senior Member Last Online: Apr 16th, 2024 19:59 Join Date: Dec 2003 Location: London View Photos By: sye73	Ah, understood - Thanks. I've tried opening the link within the thread but as the other poster mentions it appears to be old/broken, Given the problems that seem to crop up when trying to repace the contacts it, looks like it might be better to buy a new pnp switch all together: do you happen to know if the aftermarket ones fit properly and are reliable as I believe the OEM units are NLA. Cheers

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