Dizzy problems

Questions and general discussion on all things Type 3 & 4
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mawsy
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Joined: 12th January 2012 - 9:09pm

Dizzy problems

Post by mawsy » 14th September 2017 - 7:18pm

I have just had a re wire on my type 3 square, everything works, lights , indicators etc. The problem is when I crank the starter motor the voltage to the coil drops to zero all the members of our club do not have an answer. Help please to maintain my sanity cheers Mawsy

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937carrera
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Location: North Yorkshire

Re: Dizzy problems

Post by 937carrera » 14th September 2017 - 8:12pm

Is there 12V to the coil when the key is in the run position ?
David
1974 412LS Variant
1973 412LE 4 door Fastback / Saloon

mawsy
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Joined: 12th January 2012 - 9:09pm

Re: Dizzy problems

Post by mawsy » 14th September 2017 - 8:49pm

Yes 12 volts when ignition on

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937carrera
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Location: North Yorkshire

Re: Dizzy problems

Post by 937carrera » 14th September 2017 - 8:59pm

Then I would be looking at the wiring diagrams, and in particular the ignition switch. It's possible that something internally has gone wrong in the switch.

Otherwise ensure the connections to the switch are as required - there are a number of wiring diagrams available on this site
David
1974 412LS Variant
1973 412LE 4 door Fastback / Saloon

mawsy
Posts: 70
Joined: 12th January 2012 - 9:09pm

Re: Dizzy problems

Post by mawsy » 14th September 2017 - 10:04pm

Ok cheers for that

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Editor
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Re: Dizzy problems

Post by Editor » 15th September 2017 - 1:40am

Also make sure the earthing strap from engine/gearbox is connected - it could be an earthing fault. Lack of the earth return does funny things. Also check you've got the ignition to terminal 15 on the coil, not 1. I've heard of people losing the ignition when engaging reverse because the coil was connected back to front and the power was going through the reversing lights instead. Probably not the problem here, but worth mentioning I think.
Dave.

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broady_6
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Re: Dizzy problems

Post by broady_6 » 15th September 2017 - 8:04am

For what reason did you have to rewire the car?
The sultan of swing

mawsy
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Re: Dizzy problems

Post by mawsy » 15th September 2017 - 5:05pm

Was body off resto and old Haynes had been butchered and patched with a rats nest of bits and pieces and pieces

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broady_6
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Re: Dizzy problems

Post by broady_6 » 16th September 2017 - 2:12pm

ah ok so it wasn't because of an existing fault. So it worked before and now doesn't? it does sound like the ignition switch isn't wired up properly. There is a terminal that will be live with the key in the on and start postion. and that one needs to connect to the ignition live? Do you have wiring diagrams? If not ill share some links if you cant find them on google. And where are you? if its local I can always have a look.
The sultan of swing

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broady_6
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Re: Dizzy problems

Post by broady_6 » 17th September 2017 - 4:33pm

also, i wouldnt expect it to have anything to do with your dissy
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s.unsworth
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Re: Dizzy problems

Post by s.unsworth » 23rd September 2017 - 4:03pm

That sounds like the common fault of wear with these Ignition Switches. Try releasing the Key a bit when cranking it over. Sometimes when fully over to the cranking position the contacts are lost. Release the Key a bit and the contacts made again.

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