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Ok thanks, was just thinking it's likely electrical since the old starter motor coil was seizing up and overheating from the current, possible effecting the alternator? Also the engine light has starter flickering on and off.

Hi all, My friends 300tdi discovery auto has recently become very erratic when idling and the revs hunt up and down when driving making it difficult to maintain a steady speed, it occurred soon after I replaced the starter motor for him (not sure if just a coincidence), but wondering if the...

Hi all, My friends 300tdi discovery auto has recently become very erratic when idling and the revs hunt up and down when driving making it difficult to maintain a steady speed, it occurred soon after I replaced the starter motor for him (not sure if just a coincidence), but wondering if the...

Hi all, I'm getting the bonnet resprayed on the D1 in a few weeks due to lacquer peel and I would like to find some lettering badges before I peel off the old ones which are just vinyl stickers. I'm trying to find some raised silver ones but there doesn't seemed to be any specific ones for the...

Hi guys, I have now resolved the problem, since the mirrors have no relay circuit, I used their feed wire to trace the problem, when I checked the continuity between the fuse port for mirrors and the ignition feed there was no connection which led me to believe there was a connection issue...

When I bridge it, I can switch on and off at the slider switch and control the speed.

Thanks, the diagrams at the end are really helpful for identifying the relays but have now got me even more confused how only the heaters are working when bridging the ignition load relay k127, does it not supply anything else. Also, it still allows me to adjust the fan speeds meaning I can't be...

Ah does that mean I've been bypassing the ignition load relay, if so why are only the heaters operating when I do this? Also, its a 94 so I don't think the windows have a BCU. Since the mirrors aren't working as well does that imply the initial auxiliary feed is the issue since it's not relay...

Quite right, I'm a bit out of my depth with electronics when I can't visualize the circuit layout! Thanks for the advice though, I'll let you know if I find the problem. Could there be a short inside the fusebox itself?

Yes I did try identifying the relays by the wire colours in the haynes diagrams but none of them seem to have all four wires that match, so I'm never sure which one I'm referring to. It's like its got a 200 wiring loom but with the engine bay fuses of a 300!

Thanks, didn't realize that rear relay was for ignition, I thought that was the heater blower one because that's the one I bypassed by bridging the pins and it triggered the heaters. Does that mean my relays are in a different order or am I bypassing the ignition load?

I'm also wondering if there's a short somewhere as the feed to the coil side of the heater relay is showing continuity to the earth for some reason?

I just checked the resistance between the footwell earth plug and the body, it was zero showing the earth point is good, I then measured the resistance between one of the black wires on the relays and the earth plug and it showed over 100 which is confusing? Also if I have the engine fusebox...

Yes, I put a good 3 coats of the solvent based Red oxide primer before the top coats of enamel chassis black.

Is there a way of telling how early of a 300 it is by the registration? The old british plate was L807 LGM

Hi all, I have a 1994 discovery 300tdi which my Grandfather owned from new, he then sold it a number of years ago over to France and then I spent months trying the track it down again and eventually managed to buy it back. It was the first car I can remember when I was younger and I always loved...

That's the clever logic I was looking for, bypassing the relay seemed to narrow it down!👏

Thanks:vb-tup:

Thanks mate that's really useful I'll check that earth tomorrow! I'll introduce myself now!

Hi all, I need help with some electrical troubleshooting on a 94 300tdi. After filling up the coolant system and running it for the first time in a while I went to switch on the heaters but nothing, then tried wipers, windows, electric mirrors - all dead! Lights work and everything runs fine...