brake lights
brake lights
Author
Discussion

d3ano

Original Poster:

7,414 posts

282 months

Tuesday 18th January 2005
quotequote all
How about this for luck. Both brake light on the Chim went at the same time lastnight. So i now have no light on the back (well no brake lights).

I assume that the 1996 4.0 chim uses the normal stop and tail light that one can buy from halfud? Or does anyone recommend anything else?
Can't really go anywhere until the shops open at 9 to get the lights.

Oh and does anyone know how to access the light cluter in the back?

AlexB

317 posts

265 months

Tuesday 18th January 2005
quotequote all
On my 95 Chim bulb access is quite easy at the rear. From within the boot, pull the carpet away from the light clusters and the bulb holder should easily unclip from the reflector assembly. Replace the bulb and clip back into place.

I think the bulbs should be standard parts (according to the 'bible' the cluster is a Mark III Fiesta part)

Alex

Nuggs

4,640 posts

263 months

Tuesday 18th January 2005
quotequote all
Hi d3ano

It's a standard dual filament single bulb 21/5w stop/tail that you need.

If something other than Halfrauds 'own' is available, I'd go for that. In my experience, the Halfrauds ones don't last very long...

chimhunter

906 posts

278 months

Tuesday 18th January 2005
quotequote all
Are you sure its the bulbs and not the switch on the pedal? Went on mine 3 days into ownership.

Rob

d3ano

Original Poster:

7,414 posts

282 months

Tuesday 18th January 2005
quotequote all
how would i know its the switch?
Would assume that its the lights as the previous owner changed both of them at the same time about 1 1/2 ago.

Nuggs

4,640 posts

263 months

Tuesday 18th January 2005
quotequote all
d3ano said:
how would i know its the switch?
Would assume that its the lights as the previous owner changed both of them at the same time about 1 1/2 ago.


Mine blew together (either that or in very quick succession). I replaced both a couple of months ago and they're both working fine now.

As bulbs are so cheap and easy to fit - start there. If that doesn't do it, let us know and I'm sure someone will have some more technical ideas...

d3ano

Original Poster:

7,414 posts

282 months

Tuesday 18th January 2005
quotequote all
thanks

dave_p

235 posts

275 months

Tuesday 18th January 2005
quotequote all
I had to change a bulb on my mine not so long ago. When I tried to unscrew the cap to get to the bulbs..I found that Henry, Bill or Arthur had glued the access cap onto the housing when they fitted the upholstry into the boot

what should have been a 5 min job turned into 2.5 hrs!



>> Edited by dave_p on Tuesday 18th January 17:17

chimhunter

906 posts

278 months

Tuesday 18th January 2005
quotequote all
d3ano said:
how would i know its the switch?
Would assume that its the lights as the previous owner changed both of them at the same time about 1 1/2 ago.


I think that I took it off the brake pedal and checked it with a multi-meter. I could see that it was cracked but it was beyond repair. Replacement was pretty cheap though.

Rob

SotonS2

14,709 posts

267 months

Tuesday 18th January 2005
quotequote all
d3ano said:
how would i know its the switch?
Would assume that its the lights as the previous owner changed both of them at the same time about 1 1/2 ago.


Just short across the switch with the blade of a screwdriver or similar. If the lights come on, the switch is faulty.

IMO, its highly unlikely that both bulbs have gone at the same time. I assume you have checked the fuse ?? Isn't the wiper park switch (which is prone to shorting and popping fuses) wired into the brake light fused circuit on some Chims ??

stegefal

196 posts

260 months

Tuesday 18th January 2005
quotequote all
According to the bible you are spot on, a 20A wiper park & brake light fuse.

d3ano

Original Poster:

7,414 posts

282 months

Tuesday 18th January 2005
quotequote all
right its not the blub.
So now that leaves the fuse and/or the switch.
Now does anyone know what fuse it is? I looked at it and thought, "crap, don't like the look of that". Its so far back too!
Can anyone tell me which one it is?

Thanks

d3

SotonS2

14,709 posts

267 months

Tuesday 18th January 2005
quotequote all
d3ano said:
right its not the blub.
So now that leaves the fuse and/or the switch.
Now does anyone know what fuse it is? I looked at it and thought, "crap, don't like the look of that". Its so far back too!
Can anyone tell me which one it is?

Thanks

d3


Assuming that the previous users have replaced blown fuses like for like, then simply pull out all the 20A ones and look for any where the conductor is discontinuous.

Alternatively, if your wipers return to the parked position of their own accord when you turn the wipers off, then it isn't going to be the fuse.

Try shorting across the brake light switch (with the ignition turn on, of course) and let us know how you get on.

stegefal

196 posts

260 months

Tuesday 18th January 2005
quotequote all
Actually after another read, there appears to be another panel for the late 95/early 96 model, with a 10A speedo/brake/Reverse fuse.

This fuse was between a 10A mirro control fuse and a 15A Heater system fuse.

If you told us the layout of the fuse values, we could probably figure out which is the brake fuse and which fuse/relay panel you have.

d3ano

Original Poster:

7,414 posts

282 months

Tuesday 18th January 2005
quotequote all


Nope, looked at all the 20amp fuses and they are all intact and the wipers are working.
Not only are the brakes light not working, but some little shit has also put more key marks on the car. I don't know how i'm going to tell the wife. Maybe i should leave it until tomorrow, otherwise she won't sleep.

Erm....Any help guys?

thanks

D3

d3ano

Original Poster:

7,414 posts

282 months

Tuesday 18th January 2005
quotequote all
Checked all 10 and 20 amp fuses, even some 15.
none have blown.
Now what?
Really not in the mood to finsh off tonight. Marks on the car has really put me in a foul mood.

sotonS2

14,709 posts

267 months

Tuesday 18th January 2005
quotequote all
Can't help with the vermin who seem to delight in damaging other people's property. Never, ever mess with another man's wheels

OK, so the wiper parks itself so its unlikely to be the park switch.

You've checked all of the 20A fuses and these were OK but as pointed out above, some Chims have the brake lights tapped into a 10A circuit. If it were a blown fuse, then you would notice some other device(s)not functioning - reverse lights, interior light ? For now, lets assume that the problem is NOT a blown fuse.

The most likely cause of your problem is the brake light switch.

I think the pedal switch on a Chim has two spades connected to it. When the pedal is pushed, the switch goes short circuit and volts pass from the feed side of the switch, through the switch and on to the brake lights.

This can be checked one of two ways:

1) Remove the switch from the equation. To do this, remove the spade connectors from the switch and connect them using a straighened paper clip or piece of wire. Turn the ignition on. If the brake lights come on, then the fault must be the switch.

2) Buy a test lamp or multimeter - Maplin sell these for less than a fiver. Connect the black probe to a known earth point. Turn the ignition on and touch the red probe onto one side of the switch. If this reads 12v then you have found the live side. Push the switch and place the red probe on the other side of the switch. If this reads 12v then the switch is OK. If you measure 0v then the switch is dead.

If you do measure 12v at the switched side, then the problem exists somewhere between the switch itself and the brake lights. Finding this can be a bit more problematic.

I've no great experience (almost none at all) of Chim electrics but isn't there a known 'weak' spot / connector block behind the panel by the door recess ?

I find it easiest to break electrical problems down into bite sized chunks. For instance:

12v at the fuse (confirm which one it is from the Bible) - Yes / No
12v feed to the brake light switch - Yes / No
12v on the other side of the switch - Yes / No
Continuity in the cable from the switch to the brake lights (this is where the multimeter comes in handy) - Yes / No

Running through this process will at least isolate whereabouts in the circuit the problem lies.

Best of luck.

d3ano

Original Poster:

7,414 posts

282 months

Tuesday 18th January 2005
quotequote all
thanks.
will have a quick look at this tomorrow morning.
god only knows how the missus is supposed to get to work tomorrow as this is her method of transport.

shit its one thing after another.

chimhunter

906 posts

278 months

Tuesday 18th January 2005
quotequote all
Don't worry too much. My switch went 3 days before a trip to France. Bit of a panic but a simple fix in the end. Plenty of advice above on how to test it. The wires simply pull out of the switch housing. You can then press or hold them together to check to see if the lights come on (ingition must be on too). If that works then its time to get to your dealer/specialist for a new switch. Like I said, they're pretty cheap and I fitted in in 30 seconds or so. Its been fine since.

Its been the only thing that I've needed to do to it outside of a service.

Good luck tomorrow,

Rob

full_chat

287 posts

305 months

Friday 21st January 2005
quotequote all
Just had the brake lights fail on my Chimaera, turned out to be the plastic wiring connector behind the light unit itself in the boot - it had worked lose so it wasn't connecting, although at a glance it appeared ok so warranted a thorough check.