Back to the Electrical Drawing board (89 245 Flasher Unit)

My flasher unit supplies me with entertaining 'Ghost' clicks. The flasher unit works perfectly when either the blinkers or hazards are engaged but during rest it intermittently clicks all by itself. This morning I pulled the rear headliner and disconnected the two wiring harnesses leading into the tailgate, sure that this would cure the problem but no luck. I have replaced the flasher unit and hazard switch, cleaned all fuses and a lot of grounds. Can anyone point me in another direction since apparently the tailgate harnesses are not to blame either.

Thanks, Danny.

Reply to
Danny
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Hello again Danny,

Apopolgies all for top posting it seems appropriate this time.

You are having fun aren't you, I'd bet your very fed up with seeing behind that centre console now!! The amount of testing you've done so far is directing the process of elimination to the unsavoury area of the seatbelt warning system unless anyone else knows better, I think there is only one easy definitive way of testing for this causing your problem, but, it does involve interfering with some more wiring, it's as follows:- from terminal 49a on the flasher there should be three yellow wires, two of them go to the front seats, the other goes the indicator stalk switch, then back to the hazard switch, if you are confident enough, pry at the small catch which releases the yellow bunch of wires from the relay plug, and remove the yellow wires from the plug, reconnect the relay to the plug; you need to then separate all three yellow wires from the previously freed spade connector, strip a small amount of insulation from the end of each; turn on your hazard light switch, at this point nothing should be flashing, touch each of the yellow wires in turn back to terminal 49a (through the hole in the plug), one of them will cause the flashers to start working, this is the important one to reconnect back properly (you should be able to figure a way) to 49a; one of the other yellow wires should cause the seat warning lamp to flash (assuming LHD with no one currently in the passenger seat), put a label on this wire to the effect that it's for the drivers seat, the other yellow wire, if there is a passenger seated (seatbelt unclipped), should also cause the seatbelt warning lamp to operate, also label this wire for future reference. Leaving the two seatbelt wires disconnected, but insulated, re-assemble things to your satisfaction, try a short drive somewhere (after checking your flashers still work ok!), if your flasher relay is now behaving itself, then celebrate, if it isn't, then the only other thing I can think might be causing this problem would be an unstable or 'dirty' supply voltage from your alternator, though this is extremely unlikely, it's fixable by changing the voltage regulator, other than this I'm now officially stumped, unless there is some third party electronics, such as an alarm somewhere attached to the indicator wires, but it would have to be very faulty to cause this.

TTFN, Ken

"Danny" wrote in message news: snipped-for-privacy@posting.google.com...

Reply to
Ken Phillips (UK)

Thanks for your help Ken

And yes, I am having fun, I love a puzzle. I went out to do as you instructed and found only a single yellow wire coming off terminal

49a. I hunted around for some homeless, cut yellow wires from a possible previous attempt at this repair but to no avail. In looking through the wiring diagram I came up with two other plans. The easy one seems to be taking out the seatbelt warning bulbs which woul cut out most of those circuits (with the exception of the wire running from terminal 49a to the bulbs themselves. the more difficult but slightly better option seems to be disconnecting terminal 49a and running a jumper from it straight to the direction indicator switch.

What do you think?

Danny

Reply to
Danny

Check the ground in the steering column

Reply to
G Klein

Thanks, the ground on the steering column looks good!

Danny

Reply to
Danny

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