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[zirk]

Ok, and each GP restance to neg (plug diconnected).

[Agemo]

checking now . . .

[Agemo]

OK, just making sure I am doing this right. Meter - black lead on Neg of battery - red lead on glow plug, reading zero ohms. I can only reach two plugs without extending wires.

[zirk]

OK, just making sure I am doing this right. Meter - black lead on Neg of battery - red lead on glow plug, reading zero ohms. I can only reach two plugs without extending wires.

Almost, I meant measure the GP resistance from the top of the relay connecter (6 black wires on the top, that way your measuring the complete circuit of each one after the relay.

Hope we are talking about the same relay here, will try and find a pic (Rob!).


Edit pic added, only pic Ive got is this one shows the GP relay top right, the thicker black wire x 6 are the ones feeding GP's

[Agemo]

Thanks Rob. I do appreciate this. 

[zirk]

Thanks Rob. I do appreciate this. 

No Im Chris, Robs the one that should have posted a pic up in less than 10 nano secounds, but failed His task on this occasion. 

[zirk]

Ok Pic posted, go up 3 ^^

[Agemo]

Sorry Chris, Rob you're getting slow! I will have a look for THE BLACK WIRES.

[Agemo]

OK, all six black wires reading zero ohms. Not sure if that is good or bad. 

[Agemo]

I am assured the replacement relay was a good one, and to be honest the old one worked this morning. I am thinking I must have disturbed something changing them. 

[zirk]

OK, all six black wores reading zero ohms. Not sure if that is good or bad. 

Probably the meter, Digital or Analogue, if Analogue might not read it if not zero'd. so assume GP's are ok, need to log off soon, and still not convinced where this 3.5v on the GP side of relay is coming from, might be worth putting that down as a red herring as it seems to have thrown us off course a bit. or may be someone with a TD could have a measure.

But you get the idea, GP relay straight to battery via fuse relay contact simply supply battery volts to each GP in turn via each off the 6 wires, the relay Timer and Dash Bulb run on a separate circuit, from memory the the GPs are still fed with 12v about 5 seconds after the dash bulb goes out.

So time to start measuring why the 12 volts is not getting to each GP.

Theres nothing to stop you from feeding 12v to the GP's manually or forcing the contacts accross, (no more than 10 seconds at a time) and see if the Car starts.

Chris.     

[Agemo]

OK Chris. Thanks anyway, my meter is an old analogue driven by steam, but then it read the 3.5 volts 
I like the idea of feeding 12v to the GPs. I will examine every wire in there tomorrow. Thanks again Chris, sorry to take up so much of your time.

[Agemo]

Latest - I have nearly 12 volts at the plugs when I close the points. After ten seconds I tried to start the car, spinning over but won't fire. I found a green  wire with a black tracer, which had been kinked, there was bare wire showing, I now suspect this has shorted across something, not sure where to go next. I even think it could have fried the ECU but don't really know a way to test it. I can't paperclip or pedal test mine. 
 

[zirk]

What happened to the 3.5v is that still there, when you say nearly 12 v what figure should be pretty much battery volts.

[Agemo]

Hi Chris. Yes the 3.5 volts is still there, not sure if it should be. I operated the points (yes they get hot) and there was 12 volts at the plugs, but there was no way the engine was going to start.