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Electrical tantrum
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Topic: Electrical tantrum (Read 4528 times)
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B20B24
Senior Member
Posts: 168
Electrical tantrum
«
on:
22 June, 2013, 06:20:56 PM »
I wonder if anyone can suggest the cause of a severe electrical tantrum on my son's Evo 2 (1994).
It was running fine today when suddenly the electrics went mad - an erratic (high) tick over, engine racing, all gauge needles jumping everywhere, battery gauge dead (the battery is fine) and indicators which seem to have a mind of their own.
We suspect a sensor, but could one sensor impact all this at once?
Thanks
Clive
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'58 B20 S6
'53 B20 S3
'67 Fulvia Sport
chugga boom
Non-LMC Seller
Permanent resident
Posts: 1754
Re: Electrical tantrum
«
Reply #1 on:
22 June, 2013, 06:36:28 PM »
common fault on evo electrics that my old car became a culprit to was the battery earth where it connects to the gearbox had almost corroded through but where the cable was crimped into the connector, to look at it looked fine when removed and inspected it was trashed and needed replacing, all my electrics went nuts and I had the problem for a few weeks until when starting the car it set the Goodrich hoses on fire as the starter earthed through them!!! worth a look but ive heard of a few with the same fault, as a tempory cure or to test just put a single jump lead from the battery negative to a good earth point on the engine
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1935 augusta lusso (chugga)
1935 belna saloon
1935 augusta lusso
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B20B24
Senior Member
Posts: 168
Re: Electrical tantrum
«
Reply #2 on:
22 June, 2013, 06:57:37 PM »
Thanks Chugga, we'll check this out.
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'58 B20 S6
'53 B20 S3
'67 Fulvia Sport
fay66
Permanent resident
Posts: 6189
Re: Electrical tantrum
«
Reply #3 on:
22 June, 2013, 09:48:13 PM »
I'm right behind James on this one, as Dedra Technical Adviser I've come across similar problems with what appear to totally unconnected faults being down the the battery earth cable, on a number of Dedras including one of my own.
Brian
8227
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Own 1966 Fulvia 2C Berlina since 1997, back on road 11-1999.Known as "Fay"
2006 Renault Megane 1 5 Dci Sports Tourer
Dedra Technical Adviser
B20B24
Senior Member
Posts: 168
Re: Electrical tantrum
«
Reply #4 on:
25 June, 2013, 05:51:10 PM »
Well....I removed and refreshed the main earth to no avail.
We started looking at other earths and noticed the immobiliser was loose and unsecured sitting on top of the ECU, which in turn was unsecured. The ECU earth was loose, caused by the errant alarm unit. Anyway we quickly fixed that and hey presto all now working fine. The workmanship here looks shoddy (receipt in the history file from Toad, so a professional installation some time ago paid by the previous owner). The wiring looks amateur and if it were my car I'd rip the pesky thing out and chuck it, but I guess you'd be best paying Toad to remove it all as god only knows how it's all connected.
Thanks again to Chugga and Brian
Clive
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'58 B20 S6
'53 B20 S3
'67 Fulvia Sport
m tulloch
Megaposter
Posts: 215
Re: Electrical tantrum
«
Reply #5 on:
26 June, 2013, 05:50:42 PM »
I've found exactly that problem with alarm/immobiliser installations in the past on a few cars.
That's why I always fit them myself so I know it's done properly with solder & heatshrink.
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