Central locking 360 GLT issues

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kelvingenders
Posts: 463
Joined: 12 Apr 2010 08:40 am

Central locking 360 GLT issues

Post by kelvingenders » 29 Apr 2012 09:15 am

My central locking isn't working. The problem seems to be the driver's door. I have now tried to replace the black sender unit (the part where the push rod connects to the loop) 3 times and this has still not fixed the problem. "Most" other electrics are fine on the car. Is there a solution to this annoying problem?

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: Central locking 360 GLT issues

Post by Ride_on » 01 May 2012 07:22 pm

Yes always a solution. You've tried the obvious item, it didn't work so stop changing it. The fault is elsewhere, its not a common fault so you may have to trace the wiring. Are you sure the other motors are working?
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

kelvingenders
Posts: 463
Joined: 12 Apr 2010 08:40 am

Re: Central locking 360 GLT issues

Post by kelvingenders » 02 May 2012 08:17 am

All other motors were working until the drivers sender failed

MCHUDD
*** V3M DONOR ***
Posts: 2537
Joined: 18 May 2006 03:43 pm
Location: BELFAST UNITED KINGDOM

Re: Central locking 360 GLT issues

Post by MCHUDD » 02 May 2012 02:58 pm

Hi Kelvin.
If the drivers one fails, they all will as it is the one that sends
the power to the others.
Cheers Mark.
sm4 sm4 sm4 sm4 sm4

kelvingenders
Posts: 463
Joined: 12 Apr 2010 08:40 am

Re: Central locking 360 GLT issues

Post by kelvingenders » 03 May 2012 08:27 am

Is there anyway of testing if the sender unit works other than in the car.....or how can I check if there is voltage to the sender unit?

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: Central locking 360 GLT issues

Post by Ride_on » 05 May 2012 12:56 am

yes, the door motors are simple motors (linear), you feed in 12v and they click one way, reverse it and they click the other way.

The driver door units sends out a short 12V signal on 2 wires, the polarity changes according to which way it is switching.

Check the driver door unit is getting power (permanent 12V, pink wire according to my manual) and ground.
Check it is outputting a pulse on the green and yellow wires, the polarity should reverse when you push the switch the other way.
Then check the continuity of the green wire at both ends between the driver door and the say the passenger door. Do the same with the yellow wire.

Do you have a multimeter?
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

kelvingenders
Posts: 463
Joined: 12 Apr 2010 08:40 am

Re: Central locking 360 GLT issues

Post by kelvingenders » 05 May 2012 11:04 pm

Yep have a multimeter, what setting do you suggest?

Ride_on
Posts: 2262
Joined: 26 May 2009 05:34 pm
Location: Belfast, N. Ireland

Re: Central locking 360 GLT issues

Post by Ride_on » 09 May 2012 05:53 pm

Volts to check for volts and polarity, whatever you need to see 12V.

Continuity or diode to check for continuity between the 2 ends of the same unplugged wire *eg between doors

Bulb might be better for the pulsed output, but it won't indicate polarity. Depends how quick your meter is.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

kelvingenders
Posts: 463
Joined: 12 Apr 2010 08:40 am

Re: Central locking 360 GLT issues

Post by kelvingenders » 10 May 2012 10:09 am

Thanks Ride on

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