glow plugs staying on all the time

[sean86]

hi all have dw8 xsara lifted the bonnet this morning and saw the thread top of plug red hot and the wire were all melted. any ideas?? glow plug relay?

[Peter.N.]

Yes, glow plug relay, unless it has a permanant supply from the ignition switch.

Peter

[citronut]

yep as Peter says
i have seen this on a pug 306TD, but this one just burnt out a new set of glow plugs

[sean86]

ya was thinking thanks lads. should i change the glow plugs as well?? thanks sean

[citronut]

should i change the glow plugs as well?? thanks sean

yes definitely

[spider]

When you've replaced the relay and plugs, carefully attach a test lead to one of the glow plugs or its supply wire and watch its operation.

They will be on with the warning light and a short time after, in some cases even with the engine running (post heating) but they should not be supplied for too long.

[sean86]

ok will do just order the relay. the glow plugs are only a month old. but i guess it better to be safe. the wire going for the relay to the glow plug harrenss is fried as well. cant find any1 on line would i have to go main dealer to get that??

[sean86]

ok will do just order the relay. the glow plugs are only a month old. but i guess it better to be safe. the wire going for the relay to the glow plug harrenss is fried as well. cant find any1 on line would i have to go main dealer to get that??

[citronut]

the cable linking the glow plugs is about £5.00 from the dealer

here is price and part No.

Part Number Description Quantity Price excl. VAT Price incl. VAT Total incl. VAT Selection
0000596984 GLOW PLUG CABLE 31.81 GBP 38.17 GBP 38.17 GBP

the price of the correct one for your car i would buy two of the ones below for an XUD engine if the spacing between the plugs are the same,
then use one complete and cut the extra tolink from the end plug the the timer box from the second new cable second one

[sean86]

thanks malcolm very helpful

[citronut]

sorry i forgot to paste the price and part No. of the cheaper option ( X2 )

Part Number Description Quantity Price excl. VAT Price incl. VAT Total incl. VAT Selection
0000596978 GLOW PLUG CABLE 5.68 GBP 6.82 GBP 6.82 GBP

[sean86]

well got the relay box same story tested it with a test light glow plugs stayed on for a 2 min. with car running. wire started to burn again. what be the next step to take thanks in advance sean

[miked]

I don't know for sure how long the post-heating time is but 2 minutes might be correct.
If it's the same previously melted cable overheating then I would think it will need replaced.

[sean86]

update timed glow plugs when i turn key to g p light (without starting) they stay on for 40 sec and when the car is running 3 min. does that sound rite?? the old wires and glow plugs are still in i just want to make sure in case i burn out more things.

[Peter.N.]

You could double up on the wires, fit new ones and leave the others on, that should help the problem.

Peter