Classic Audi Technical Mech/Tech Electrical problems » Loss of majority of electrics

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Old 17-05-17, 03:26 PM   #1
cjp0349
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Unhappy Loss of majority of electrics

1991 model B4 2.0e 16v. Became aware of having no indicators on the way home from work this afternoon although the hazards appeared to be working correctly.

On arrival at cjp towers a full check reveals loss of not only the indicators but dipped beam, washers/wipers, dashboard lights, rear fog, horn, HRW, fan and number plate lights.

I strongly suspect 'relief' relay 213 has failed. Part number 443 951 253J, 70amp.

Anybody got one that they can stick in the post first class tomorrow so I can hopefully have it Friday please let me know and I'll sort payment straight away

Or am I making a totally wrong snap diagnosis?
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Old 17-05-17, 03:40 PM   #2
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Hope you get sorted quickly Carl !

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Old 17-05-17, 04:09 PM   #3
Hanuman
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As a snap assumption, it seems a reasonable thought.

It may be worth pulling the relay, checking that the pins are clean, and the connections in the relay box are fairly tight.
if it starts working again, you may simply have a bad contact, or you may have a failed solder joint. I'd try and open it, and have a good look inside. Are you any good with a soldering iron?

...(edit) Alternatively, Ignition switch? I'd have to look at the circuit diagrams to remind myself,
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Old 17-05-17, 04:27 PM   #4
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I suffered very similar symptoms with no warning late last year.
Replacing the Relief Relay sorted it out (sourced one s/hand from a well known auction site)

Good luck with finding one quickly.
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Old 17-05-17, 04:31 PM   #5
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Quote:
Originally Posted by Hanuman View Post
As a snap assumption, it seems a reasonable thought.

It may be worth pulling the relay, checking that the pins are clean, and the connections in the relay box are fairly tight.
if it starts working again, you may simply have a bad contact, or you may have a failed solder joint. I'd try and open it, and have a good look inside. Are you any good with a soldering iron?

...(edit) Alternatively, Ignition switch? I'd have to look at the circuit diagrams to remind myself,
All the basic checks were done before I posted Hanuman but I'm never so lucky as that!
My snap judgement is based on the fact that I had a very similar thing happen on my old T4 camper about this time last year and turned out to be nothing more than a failed relay. So fingers crossed.
I've ordered a, very cheap, guaranteed working 2nd hand replacement via ebay but it will probably only be with me Monday. Hoping I can get one a bit quicker here
Never used a soldering iron in my life
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Old 17-05-17, 04:35 PM   #6
vorsprung durch technik
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"On arrival at cjp towers" Cracked me up!

Quote:
Originally Posted by cjp0349 View Post
Never used a soldering iron in my life
Easy peasy Janpaneesy. Just remember not to burn yourself.

I reckon your most probably right Carl. Hope you get it sorted.
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Old 17-05-17, 04:49 PM   #7
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relief relay normally only kills the higher power items like fan, heated rear window, wipers
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Old 17-05-17, 05:14 PM   #8
cjp0349
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Quote:
Originally Posted by mikes2 View Post
relief relay normally only kills the higher power items like fan, heated rear window, wipers
That's exactly what failed on the T4 Mike

Just hoping there's a few more items on it's circuit on the B4. It's as if I've just been left with emergency electrics i.e sidelights and hazards.

(And stereo! )
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Old 17-05-17, 05:20 PM   #9
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[quote=cjp0349;427515

(And stereo! )[/QUOTE]


must be the DJ in you
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Old 17-05-17, 05:27 PM   #10
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Jumper the switched contacts and see if it all works as normal would be an easy test.
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