Central locking Problems on Chimaera

[SMB]

Guys, Your help please, Whilst driving along the central locking trips and the relays / solenoids in the doors chatter. In the past I fixed this by re installing the door pads for the courtesy light switches, this time however this isn't the problem. ( I've even taken the switches out completely and the problem remains) has anyone seen this before?

I can only suspect the central locking relay or a dodgy earth connection somewhere, I believe the relay is under the dash pod , but where do the relays/solenoids go to earth?

The car locks and unlocks find whilst staionary , it's just whilst on the move. Help!!!!!!!!!

[SMB]

Keep the ideas coming guys, thanks for the responses so far, as you can see I've tried all the usual routes but completely stumped by this. It's difficult to recreate whilst stationary aswell.

Any ideas on where the earth is for the door switches/locks etc? or can i disconnect an alarm wire to prove a point? if so which one?

thanks
Steve

>> Edited by SMB on Saturday 7th June 12:48

[smb]

ribol said: I think a good place to start would be to find out exactly what does happen when you are driving along. Is it always trying to lock the car or is it always trying to unlock an unlocked car and can it actually do so on its own? Or is just pulsing the solenoids and getting neither done? I think this would definitely get you nearer to solving the problem. If it always locks unlocked doors for instance then its very unlikely we are talking about an earthing problem.

Ivan

OK, if doors are closed and locked from inside, whilst driving along doors will unlock ( don't open) and door motors start chattering. If the doors are closed but unlocked they will not lock, but will start chattering. ie the same symptoms as missing pads on the doors which was my first guess, but even with the switches removed to simulate doors closed, the problem occurs. Also the car is a 95 model with chrome buttons behind the doors ( no key lock)
thanks

[SMB]

The roof will be off and windows down!
Looks like I have to venture under the dash.
Cheers

[SMB]

spend said: FWIW, I have seen this with faulty lock solenoids.

I would try disconnecting the door connectors to the lock solenoids. If it stops; then conect 1 at a time to find which lock is shorting.

This should be quick & easy diagnosis, compared to accessing dashboard cover.

HTH Dave

Thank dave, I'll check it out

[smb]

spend said: FWIW, I have seen this with faulty lock solenoids.

I would try disconnecting the door connectors to the lock solenoids. If it stops; then conect 1 at a time to find which lock is shorting.

This should be quick & easy diagnosis, compared to accessing dashboard cover.

HTH Dave

I've now disconnected both door solenoids and door switches but the problem remains ( I can hear the relay tripping under the dash, , curiously it appears to be worse when the car's hot.

Next step is to lift the dash I suspect.

[smb]

OK, I think I have narrowed this down to the cetral locking relay ( all other parts have been disconnected at one stage of another but the problem remains.)
After taking the cover off the relay it feels as if one of the two solenoids isn't holding away from the contacts as it should. So a new relay it is.

Can I get this parts from anywhere else than a TVR dealer, they want £44, similar on the web is £8, I'm all for originality but that's ridiculous.

Any suggestions on where else I could get this part?
thanks

[smb]

I've done some basic research, the basic pin out seems to be the same, you can buy a whole central locking kit including relay,solenoids and cabling for £35. The relay is made by italamec in Italy , and I think is common with most aftermarket kits.

[smb]

unfortunatley not, you need to lift the dash top on the passenger side. it's obvious which one it is, made by italamec, , part 358, with 'centralina bloccaporte' written on it.

>> Edited by smb on Monday 7th July 17:28

[smb]

just a quick update, i've ordered the part for next day delivery £12.75 inclusive.

he says they used to supply TVR!

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