2.1TD Not Cranking - Relays Buzzing

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

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maxc
Newbie
Posts: 6
Joined: Thu Apr 08, 2010 8:33 am

2.1TD Not Cranking - Relays Buzzing

Post by maxc »

Have hit a major problem wioth my girlfriend's '98 2.1TD. When you turn the ignition on the glow plug light does not come on and the starter will not engage. The multi-function relay (next to the ECU) buzzes whilst the ignition is on. If this is disconnected the glow plug relay also buzzes. It started out as an intermittent problem when hot, but is now permanent. I have changed the glow plug relay and the multi-function relay but without success. All the connectors look ok with good earths. I'm looking for input on fault-finding - planning on disconnecting the glow plugs from the relay to see if there is a short, then work backwards through the loom. The cooling fan is also coming on as soon as the ignition is on, though this could be a seperate issue. Any suggestions are welcome.
poddack
2.0 Turbo
Posts: 382
Joined: Mon Jul 14, 2008 10:33 pm
Location: Bristol

Re: 2.1TD Not Cranking - Relays Buzzing

Post by poddack »

buzzing "motorboating" sounds like a power problem, maybe the earth strap from the battery to the bell housing is loose, also check the battery connections and the battery itself.
406 estate, 2.1TD, I fixed her, then part exchanged her for a Mercedes E300TD Avantgarde Estate.
Hmmmm, straight 6 goodness!
poddack
2.0 Turbo
Posts: 382
Joined: Mon Jul 14, 2008 10:33 pm
Location: Bristol

Re: 2.1TD Not Cranking - Relays Buzzing

Post by poddack »

SOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO, did you fix it?
406 estate, 2.1TD, I fixed her, then part exchanged her for a Mercedes E300TD Avantgarde Estate.
Hmmmm, straight 6 goodness!
maxc
Newbie
Posts: 6
Joined: Thu Apr 08, 2010 8:33 am

Re: 2.1TD Not Cranking - Relays Buzzing

Post by maxc »

I'm away all week so will run through it at the weekend. I'll report on what I find.
maxc
Newbie
Posts: 6
Joined: Thu Apr 08, 2010 8:33 am

Re: 2.1TD Not Cranking - Relays Buzzing

Post by maxc »

I finally got round to fixing it today and it was a the ECU earth wire. I cut out the in-line connector and soldered on a new tag. I also put on a new auxillary belt as the cheapo one I fitted 6 months ago was badly cracked, so went with a Dayco belt from GSF. Thanks again for the advice.
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