The MGF Register Forums

Hi
On a 135tf 53 reg.
I have a passenger door that will not unlock.
It seems to be deadlocked as the sill button will not unlock it.
The key fob will lock the car, but will not unlock it
The key will unlock the car, but only unlock the drivers door.
The car can be started ok.
The problem started after the battery was changed on the car.
When the new battery went in, it locked the car and the alarm sounded briefly.
the problem may have been there before, but I never lock the car.
Rural france for you.
I have seen posts about the microswitch in the drivers door. where is this?
Or other ideas?
Dave

Pektron electronics (oval key fob with coloured MG logo)?

Mykel wrote:Pektron electronics (oval key fob with coloured MG logo)?

yes

Any other electrical gremlins? horn, fog lights or anything else not working?

daz wrote:Any other electrical gremlins? horn, fog lights or anything else not working?

Everthing works.
I took the car for its french MOT today, passed except Co2 reading was 0.7 when its a 0.3 max.
Inspector thinks it might hvae an ex leak before the lamba sensor?

history is that last week we put a new head gasket with timimg belt and water pump.
Used a good head from a 1997 120 bhp car had it skimmed , and used the cams etc from the 135.

Apart from that no issues.

Doesn’t the 1997 head have drillings for the manual tensioner?

Well, anyway. It might be an issue with the microswitches but I doubt this, as the passenger lock only has one of them, indicating that the door is either open (closed circuit on switch) or closed (open circuit), which shouldn’t affect the system in the way you describe it. The central locking is driven via two of the relays (or rather one and a half, as they are dual relays) on the circuit board inside the Pektron unit, and these relays are known to break.

Best go to Paul Brown’s website https://www.technozen-electronics.co.uk, he sells both the relays and the special security tool needed to remove the unit. All information is given there.

Mykel wrote:Doesn’t the 1997 head have drillings for the manual tensioner?

Well, anyway. It might be an issue with the microswitches but I doubt this, as the passenger lock only has one of them, indicating that the door is either open (closed circuit on switch) or closed (open circuit), which shouldn’t affect the system in the way you describe it. The central locking is driven via two of the relays (or rather one and a half, as they are dual relays) on the circuit board inside the Pektron unit, and these relays are known to break.

Best go to Paul Brown’s website https://www.technozen-electronics.co.uk, he sells both the relays and the special security tool needed to remove the unit. All information is given there.

Yes changed the tens to manual
will give link a go
Thanks
David