Electrics puzzle

[GTVeloce]

Ok, I have installed a generic central locking system which works well. It is operated by a fob and also has auto lock when you apply the brake pedal after 10 secs of ignition. It then auto unlocks when the ignition is switched off. So far so good.

There is also a cable to provide pulsed lighting (one for lock and two for unlock) and I always intended to connect this to the indicators but couldn't work out how to do it without connecting the left and ride sides together. Then I discovered that a relay with an 87 and 87b should do the trick as the two poles are connected when engaged and disconnected when not engaged. Finding one was very tricky and then I discovered the A/C system uses one to control the two fans simultaneously.

This morning I ran a test run to make sure it would work properly before doing a good install. And it worked - once. I press the lock button on the fob and my doors lock and the indicators flash once. After that my fob does nothing no matter what I try and do. Everything else works however including the c/l unit. The brake pedal still locks as it should and unlocks when the ignition is switched off.

I then discovered if I disrupt the power to the c/l control box i.e. pull the fuse and then replace with the same fuse it works again - once. If I disconnect the newly connected pulse wire from the relay and 'reset' my power everything is just as it was before I commenced this mornings work.

Does anyone know why this would be happening and what I can do about it?

Thanks
Julian

[Cool Jesus]

Why its happening, I don't know. What's evident is that the relay is causing issues with the pulse signal from the control module, so remove the relay. It will have something to do with the amount of current needed and/or used by the relay

You can install direct to your turn signal wire, if that's what the install suggests. You need two diodes, shoot down to Jaycar or equivalent and get 2 1N4004 diodes. 50 cnets each or 100 for $5. These are baiscally an electrical oneway valve. The diode cylinder has a band at one end, thats the end which wont allow current to travel through the cylinder. So solder two diodes, with the bands away from the control unit on the pulse wire. Then solder one diode to the left turn signal circuit, and the other to the right turn signal circuit. Done.

Had to do this with an alarm instal on a Jeep Wrangler and a few other cars I've owned over the years. I did initially try relays, but theirs something about the current required for proper function of the relay.

Hope this helps.

[kartone]

Italian electrons do not follow logical circuits and get hot and tempermental  

[GTVeloce]

Ha ha Kartone - sometimes I think you are very right!

I was hopeful I could do this with a relay but like CJ suggests, I might be better off with a couple of diodes.

Thanks.