[Mk2] [Turbo] changed the dizzy and the battery went flat whilst driving...

[djpkins]

I changed the dizzy, it was a leaky o-ring that prompted the swap, and as i had a newer dizzy with a brand new o-ring on it...I just changed the lot.
The only wires I unplugged were the dizzy plug (seemingly all wires intact) and the king lead...I have maybe suspected that I have an electrical/charging issue cos the revs dip when voltage is applied from brakes/lights...the dizzy was marked up and I think it only goes on one way doesn't it?

[alanmr2turbo]

Ddizzy will only go in 1 way as for the charging it wont have anything to do the the dizzy or its wiring.

Do you have a aftermarket volt meter in car? If no,t attach a multimeter to somewhere inside the car and go for a long'i shdrive to see if its charging. There is a wire that goes from alternator to engine fuse box which can break and then you can have intermitant charging like it had.

Drove ok until engine bay got warm/hot and then the charging dropped off.

[djpkins]

A wire from alt to fuse box sounds likely as undoing the dizzy cap bolts with my socketdriver thing seems to snag on a wire...infact I knew that i had gotten in a bit of a tangle there and was about to check it out a bit ...but lost daylight...nice one, I'm quietly confident that this is the culprit

[djpkins]

can't really see any vunerable looking wires that could've been snagged.
voltage across the terminals...

standing idle...12.63v

running...11.47v fluctuating down.

does this mean a new alternator or is there any chance of it being an earth strap or similar wiring issue?

[Goldy]

It's not charging at all so check the alternator multi plug and there should be a wire bolted on a little post on the alternator as well. I've had the nuts work loose on one of these before.

[T.F.S.]

yea double check plug on the alt, mine had a habit of dropping out just enough to stop charge but looked connected

i put it back in with some silicone around it..

[djpkins]

the plug also looked like it had been adhered with something and was a xxxx to get out...i have taken it off...fk me there is a lot of oil around that area...old and fresh...difficult to see but it look like it's gathering or coming from the head gasket above the alt...I have been told there is a 120 amp fuse somewhere in the frunk that could be blown...any ideas on that one?
Alt feels fine , covered in oily crap though....before taking it off I connected a cable from the alt earth to the battery earth to see if it improved the voltage drop...it didn't...and I have deffo had a low electrolite level wich may point towards the regulator??

[T.F.S.]

oil dripping onto the alternator kills them pretty quick...

i have not seen a 120 fuse in the frunk

[djpkins]

Reckon so too mate...the fuse is on the wiring diagram, right after the battery, but surely if that was blown, the battery wouldn't power nowt.

[T.F.S.]

if its on the main line in then nothing would work...

you might as well change it at this point if you have another around?

[Driftlimits Performance]

2 fuses. Check 7.5amp alt fuse in front. Check wiring from plug to rear fuse box.

[Super_red]

Check the 3 pin plug on the alternator, should have voltage on all 3, 2 at whatever the battery voltage is and one slightly below. With the engine off but ignition on. My guess would be the black and yellow alternator exciter wire being bust.

[djpkins]

ok...rain stopped play...thanks for the suggestions guys,

[djpkins]

that'll do it...