Page 1 of 1

Brake lights always on my 1985 T25

Posted: 25 Jun 2026, 21:28
by jakestroudley
I have a RHD 1985 T25 and the brake lights are staying on full time. I have read a post to see what the issue is, and I think I understand that the switch which is causing the problem is located behind the instrument panel.
My question is, how do I get to it to replace it or do whatever I need to do to it? Is it a big job or is it something I could handle?
Any advice or step by step guide to the fix?
Any useful responce gratefully appreciated

Re: Brake lights always on my 1985 T25

Posted: 26 Jun 2026, 15:19
by The Hairy Camper
What switch are you intending on removing? Headlamp switch? I've not heard of this issue before, but removal of the dash is a simple job.

Re: Brake lights always on my 1985 T25

Posted: 26 Jun 2026, 18:52
by silverbullet
The brake light switch is screwed into the master cylinder and is a wet switch, sonwill require the brakes to be bled afterwards. Potentially messy job.
I'd check behind the instrument pack to see if there is potential for a short to earth, it appears to be a parallel double pole switch which gives redundancy in the event of one switch failing.

Re: Brake lights always on my 1985 T25

Posted: 27 Jun 2026, 07:45
by jakestroudley
Thank you for the responses, here's a weird thing, the lights have gone off over night. Battery is full because it's on a drip charger, van starts fine. Im going to get a friend to press the brake pedal while I watch the lights. If the y stay on again and turn off later on, has anyone any idea on that?
Bemused.
Something to do with the heat? And turning off in the (slightly) cooler night???
Thanks

Re: Brake lights always on my 1985 T25

Posted: 27 Jun 2026, 15:07
by silverbullet
Could be a symptom of residual brake system pressure, which would indicate a seized brake piston in a caliper.

Re: Brake lights always on my 1985 T25

Posted: 27 Jun 2026, 15:59
by mickcorr
In response to your question regarding the brake lights suddenly behaving themselves all I can say is that I experienced that as well. All was fine for a while and then the problem of sticking brake lights re-appeared.
For the sake of a few quid I just changed out the brake switch (as explained above). It wasn't that messy but I did have to bleed the brake system before the new switch would activate. No further problems since.