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Seat Leon 2007 - Fixed #

Posted by Phil Cake on August 5, 2021, 7:48 am

Year of Manufacture: 2007
( Optional ) Engine Code or CC: 1900 BXE

Both side repeaters not working. M.O.T. Failure
bulbs good, holders good, TECH checked no power or earth, AD diagram shows separate earths to chassis either side of car. Wires broken both sides ?, bit of a coincidence. Before going too deep is there known issue of this ? hope to sort today, only m.o.t. tester i have left is on holiday as of tonight for week and half.
Thanks

Re: Seat Leon

Posted by andyhyoung User icon on August 5, 2021, 10:21 pm, in reply to "Seat Leon"
Andrew Young

These use a no load no power circuit. What happens if you supply an additional earth to each lamp?

Re: Seat Leon - Fixed #

Posted by Phil Cake on August 7, 2021, 8:40 am, in reply to "Re: Seat Leon"
Edited by board administrator August 19, 2021, 1:46 pm

Rodents have managed to get behind fire wall and build a nest under the scuttle panel, large bits of paper, do'nt know where they got in. They chewed through both side repeater looms just inside inner wings, they left PCM Harness and alarm siren harness (right next to o/s side repeater) alone.

Re: Seat Leon FIXED

Posted by andyhyoung User icon on August 7, 2021, 10:50 am, in reply to "Re: Seat Leon FIXED"
Andrew Young

VW wiring very popular with rodents. Recently looked at a Golf where the wiring to the airbag sensor in the door pillar chewed ,along with the rear seat belts !

Re: Seat Leon

Posted by Peter Cooper User icon on August 13, 2021, 11:35 pm, in reply to "Re: Seat Leon"

Hi Andyhyoung.

I have not heard of " No load no power circuits" can you elaborate or tell me where I can read up on this.

Regards

Peter

Peter Cooper

Re: Seat Leon

Posted by andyhyoung User icon on August 14, 2021, 10:40 pm, in reply to "Re: Seat Leon"
Andrew Young

Most modern cars that have electronically switched lighting systems use a process of cutting power to the consumer if there is no load on that circuit. As an example, recently fixed the rear lights on a Peugeot with corroded pins to the bulb holder. Put a test light on the circuit and no power to it,as there was no load. Key off , wait a few seconds ,and power is restored with wiring fixed. Not sure where you can read up on this.

Re: Seat Leon

Posted by Graham Bullock User icon on August 15, 2021, 9:57 am, in reply to "Re: Seat Leon"
Graham Bullock

Just to add to what Andy has explained, I've come across several vehicles with failed tail lights that had no power to them until the fault codes for that failure were cleared.

Re: Seat Leon

Posted by Mark Carter User icon on August 24, 2021, 3:08 pm, in reply to "Re: Seat Leon"
Mark Carter

Very common as the system is monitored by the control unit.

Ford rangers will not power a headlight after a bulb failure until the DTC is cleared.

Regards

Mark

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