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Discussion Starter · #1 ·
Good morning ladies and gents

Saabarella failed the MOT last week on a few niggley points (trackrod ends, few bulbs etc), but the remaining problem still has yet to be diagnosed..... let alone fixed

Rear, nearside light cluster..... when the lights are on and the brake is applied, the side-light pops off..... its fine when the side-light is off.

Ive replaced the unit with one from my DonarCar, still the same, so the short is on the car somewhere.

One query is that with the bonnet up, and the engine not running, there is a loud click from the engine bay (not tracked it down to a specific location as yet) which i can only summise is the brake switch

Could this be at fault..... and is it available easiliy?
Sorry for stupid questions, in a bit of a mad rush this morning

Cheers dudes
Graham
 

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Graham it sounds like you have an alarm on your car? with wiring that has been done badly.

you will need to reverse install the alarm if this is the case.
 

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Discussion Starter · #3 ·
alarm?

how can brake lights be affected by the alarm? surely they will only affect the hazards and indicators?

G
 

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If the person that install the alarm and used the brake likes as warning lights by mistake this could happen, normally the hazard lights are used in alarms and front head lamps but not all installers are equal and some are just silly.

If you have a short in the wires its a bit more work to track it down.
 

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Discussion Starter · #5 ·
surely if this was the case then at some point in the past 10 years of mot's, someone would have noticed that one of the brake lights didnt work while the side lights were on


.... altho having said that, the alarm doesnt flash the indicators on the other side of the car any more

i hate electrics:evil:
 

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Clusters

Just pull the plugs out of the back of the clusters and check for corrosion on the male/female side, you'll prob find that the contacts on the earth(black) wire that runs to 1 cluster then onto the other are furred up.
 

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Many years ago when i was a rookie at the local ford garrage escorts and orions had this problem and it was tracked down to a bad earth connection and when the power was put through say the indicators the brake light flashed weakly also and visa versa...hope this helps:cheesy:
 

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I'll concur with Si on this, it does read like the sort of corrosion issues that all Ford Escort 3's used to have, the fix with them was to buy a new plug with wires [so common a problem that an enterprising electrical company made and supplied a repair harness section] and chop of the corroded end of the light harness and solder on the new [though barryboys everywhere used bodgelocks and 18months later the fualt returned, muppets] but I'd suggest checking and cleaning the connections before proceeding with anything drastic/expensive
 

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Discussion Starter · #9 ·
i'll get me nose in there tonite - although when i last looked, all the connectors did seem to in good order - but i probably missed something knowing me;oops:

Graham
 

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I am not saying it is the alarm but they can work for years and then you can get a strange problem not unlike the one your telling us now.

My brother in-laws corsa has a problem on the tails lights, when he brakes the indicators come on very dimly, when i figure it out i will let you know what is was, it maybe of some help some how.
 

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Most likely an earthing problem. Down under the radiator is usually the worst earthing point for corrosion. Take all the wires out, cut them and use new terminals, clean up the earth point. After putting everything back a good dollop of terminal protecting grease is a good idea (or vaseline)
 

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Discussion Starter · #13 ·
done - finished - sorted

some muppet had not only not put the twin filament brake/sidelight bulb in the right way round.... but having looked at the wiring diagrams properly, the other sade had the two wires swapped over:evil:

she will pass tomoro, no fear:cool:
cheers for th input guys

g
 

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just a note about the alarm install bit... some alarms (like the one I fitted recently) use the brake lights as part of an anti-theft system that works on the basis that someone driving the car without switching off the alarm will use the brakes... that signals to the alarm that something is wrong and action is taken.
 
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