9 replies to this topic

[Burnsey100]

Gents 

 

I have a 1988 Mini Mayfair 1000 it has been modified ( comestically) to look like a cooper (badly) so i am restoring to standard including the paint. (was blue is now rattle can black 

 

I recently decided to clean up the wiring looms for the coli, dizzy, alternator, horn and lights . THis meant cutting out wires that had been extended by twist and tape and replaced, in some cases with new spade connectors or in line crimps .

 

After this the car will not start., Not being a complete novice i have carried out all the usual tests which are

 

Car is negative Earth

 

!2V DC

 

12+ (ign) is present at the + coil

 

12- of the coil is connected to the "electronic points" ( pulse a light when engine cranked over.)

 

 I have NO spark at the coil ( tested by disconnecting the lead from the dizzy leaving CLOSE to earth ).

 

I have metered the dizzy cap for continuity all OK

 

The coli lead is 2K

 

I have tested the coli on another car and it works fine. Cant test the dizzy cap

 

The car was a good runner before i did the wiring work but i cant see any wires not connected any where ( apart from the oil sender wire ) oil sender is busted)

 

Should this car have a ballast resistor ? , i certainly have not removed it UNLESS it was within a taped joint, not very likley.

 

Dave 

 

[floormanager]

-Electronic points require a +12V and -ve.  Your car when built had 12V+ to the coil and -ve to the dizzy.  Have you connected the additional +12V?

 

Certainly a 1989 had a ballast resistor and a pink wire to the coil I think.  Electronic points require the ballast to be bypassed.

Edited by floormanager, 28 March 2021 - 08:15 PM.

[cal844]

What I'd do is just use a spare spark plug In a plug lead, rest the spark plug on the head and crank it over, if you've no spark chase it back to the dizzy etc

Edited by cal844, 28 March 2021 - 08:48 PM.

[Burnsey100]

Thanks Floor Manager

 

I have a 12+ (ignition ) to the coil... which terminates at the + coil and goes on to the dizzy 12 + red VDC . The -ve from the coli connect to the - from the dizzy.

 

Please clarify additional 12+ ( i am up for looking because its likely i have chopped it out and missed it). I have cut back the outer tape from the loom to look for additional wires, only found a red and black with nothing on it.

 

cheers 

 

Burnsey100

[Burnsey100]

This is the wiring i have at the coil/ dizzy. There is an additional red and black wire  which is dead

 

[Burnsey100]

Please see attached

[floormanager]

This is the wiring i have at the coil/ dizzy. There is an additional red and black wire which is dead

The white wire is the 12v+ from the ignition switch. This should be live when the red ignition light is on. The red wire from the coil is an additional wire for the electronic unit. This will or should become live when the ignition is turned on. The negative from the coil is the wire that normally connects to earth via the points. On your circuit it will go to the ignition module. I worry you might have blown the module as you mentioned a light connected to it. I did this once and blew the module. If i was you i'd put a regular distributor back on so you can text circuits etc and prove that's working. You can't see or text the electronic module.

[Burnsey100]

this a a sketch of the coil wiring.

 

The test light was a LED with a 1k in series . wired in series with the neg from the coil .  with that test the LED still flashes when the dizzy is turned .

Should have mentioned the tach connection to the neg of the coil. / dizzy.

 

Very puzzled .

Attached Files

•  coil.png   27.42K   6 downloads

Edited by Burnsey100, 30 March 2021 - 11:29 AM.

[sonscar]

Take the HT lead out of the dissy and fit a sparkplug in its end,earth the plug and check for sparks.If this is ok the coil and module and wiring are OK.If it is sparking here the problem is with the dissy cap or rotor(you did remember to refit it?I once forgot).Check under the cap for the carbon pip in the center it may or may not be sprung,I forget.If the rotor is flat it should have a spring and if the rotor has a springy bit it may not.As it worked before you have broken something(you already know this)

In situations like this imagine that I brought you this as not running and forget everything you have done up to now,Start again assuming nothing,You will beast it soon,Steve..

[Burnsey100]

Thanks Steve

 

Its a hell of a problem but i think that yours in the best approach. May just buy a dizzy cap Since i know the coil is working on another car.

 

Do you happen to know what happens if the coli should be a  type that  requires a ballast? What effect would that have if it should have a ballast .?

 

Cheers 

 

Dave