seat altea 2.0 tdi wont start

[toonbob79]

hi all
ok my seat altea (55)reg 2.0 tdi cut out on me last night now wont start i have no dash lights at all radio and locks work some times car cranks but just wont fire up . fuel pumpis working under the rear seat has any one got any idea what i can look for it is driving me crazy now please help

 

[britishsligean]

Check the battery first a good battery should read about 12.6v a bad one will be below about 11v

 

[toonbob79]

hi we have had this checked and it it fine

 

[mty12345]

Hi mate, almost certainly the main power/ignition relay under the dashboard IMO. It supplies power to the lights on the dash and i think the ecu/immobiliser etc as well. The fuel pump has it's own relay and the radio and locks don't have a relay, hence why they would all still be working.

http://www.icecavern.com/howtos/leonlowerdashtrim/main.php Thats how you get to them on the leon. Not sure about your motor though.

Also have a look here at the leon relays, http://www.seatcupra.net/forums/showthread.php?t=278911&highlight=wiper+relay&page=2 i expect you'll have a relay #100 the same as in the pic, that would be my main suspect. GFS/eurocarparts should have one

 

[inbetweener]

Yep sounds like voltage supply relay #100


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[toonbob79]

hi all thanks for help was told yesterday to check glow plugs ?? so we did and 3 of them seem to be off maybee due to some other problem i am not sure where will i find this relay #100 please

 

[mty12345]

if it's like the leon then they are under the lower dash panel. Yours comes off like this on your altea.

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That would be where i would start. Glow plugs are almost certainly NOT the cause imo. They wouldn't cause you to lose all the light on the dash.

 

[toonbob79]

thats brilliant thank you so much will post update as soon as i have checked this out is there any way to test / check this relay ?

 

[mty12345]

Apart from listening for a click when you turn the ignition on, then no they can be hard to test. If you have no lights on the dashboard but have other electrical things like the starter motor still working, then i can't see it being much else buddy. That shows you have power and that the ignition barrel itself is ok, but without that relay working the injectors and ecu won't be powered up