Datatek
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You sure it was the horn and not the alarm sounder?
P38A Signs of a faulty BECM?
- Thread starter Digweed
- Start date
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Sounded like the horn. It was a constant tone as opposed to an alarm yelp. I'm just wondering if some of the contact cleaner got in to the board, I've noticed it leaves like a white residue sometimes when it dries on a pcb. I sprayed a nice bit on to the plugs. on the plus side I met a friend of mine that I haven't seen in years who used to work for jag/lr and when I told him I'd bought a P38 the first thing he said to me was "do you really hate yourself!" then he handed me a brand new compressor that he's had sitting in his locker for years to take it away.
Datatek
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Not good contact cleaner if it leaves a residue. If the BECM was completely fecked, the car would not start, nor would the central locking work, the alternator charge light would not work etc etc.
Day 2 in the BECM household and things are not going as they should! Digweed took the BECM apart today and found that the cleaner he used yesterday had left a powdery residue all over the boards! And the new cleaner that he bought, even though it said contact cleaner, was for ignition systems and left a greasy residue after cleaning. He didn't take the chance and is going to get another cleaner tomorrow 
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Day 2 in the BECM household and things are not going as they should! Digweed took the BECM apart today and found that the cleaner he used yesterday had left a powdery residue all over the boards! And the new cleaner that he bought, even though it said contact cleaner, was for ignition systems and left a greasy residue after cleaning. He didn't take the chance and is going to get another cleaner tomorrow
Is the board not sealed with a sort of clear lacquer except for where the plugs connect?
There is something there which I reckon the first contact cleaner I used reacted with it. There was a white powdery residue left on it when I opened it today. While the cleaner I got today got rid of it for the most part it left a greasy film after it. It was only when I read the very small print that I saw it's really for cleaning distributor caps and the like, seals it from water ingress afterwards. I'll be getting a proper contact cleaner tomorrow, I'm raging that Maplin closed down here, it was very handy for things like this. Hopefully my hawkeye will be here too, tracking said it's finally in the country!!!
Datatek
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Aeroclene 50 is the stuff.
There is a very poor conformal coating on the circuit board, but damp gets under it.
Got a fast drying wd40 one, only one I could find. Got everything back together and back in the car. Put the heart sideways in me when I tried starting it, turned over for a couple of seconds and then everything went blank! Turned out I'd forgotten to tighten the bolts on the battery clamps. Once I'd sorted that and got my heart back to normal she started right up. Still nothing working inside! It's like there's a disconnect between the engine bay and the inside. I'm looking forward to getting the diagnostic tool and see whats going on.
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WD40 is not a great thing to put on any electrics (IMHO).
Its a water displacement/dispersant (parrafin) not an electrical cleaning agent.
YMMV. Your choice.
Its a water displacement/dispersant (parrafin) not an electrical cleaning agent.
YMMV. Your choice.
It's a WD40 branded contact cleaner not the WD40 stuff itself.
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OK, sorry. My Apologies.
Datatek
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actually a fish oil based product i think and useless on electronics.
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tomcat59alan
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You're right on that. This is the stuff i used though. Although i had a mini heart attack when it just died cranking over! Battery clamps were loose.
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tomcat59alan
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Was it the smell of fish bringing back memories? Remember once your past the smell you've got it licked.
kds
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Groan !Was it the smell of fish bringing back memories? Remember once your past the smell you've got it licked.
