Wiring nightmare, help!

Discuss and exchange views and technical information about our cars.

Moderators: scimjim, philhoward, Lukeyboy46, erikscimitardemon, Roger Pennington

User avatar
Old and Slow
RSSOC Member
Posts: 1001
Joined: Tue Jan 20, 2015 5:37 pm
Location: East Berks
Has thanked: 2 times
Been thanked: 47 times

Back to points, new dizzy, diagrams please?

Post by Old and Slow » Sat Oct 06, 2018 5:34 pm

The white and yellow comes from the live to the coil, and then there is only one wire, it runs from the other side of the coil to the dizzy (and inside the dizzy to the contact breaker).
Doesn't matter what colour it is! :D
On mine it is brown, too, but after 50-odd years I expect it has been replaced a few times.
Good luck, hope it works.


Philip Needham
Ashley-bodied TR3; '54 Ford Consul; '55 AC 2-Litre Saloon;'65 850 Mini; '70 Ford Zodiac MkIV; XR3i
'81 911SC Targa, '64 Sabre Six

jlovie
Posts: 21
Joined: Sat Sep 15, 2018 5:10 pm
Has thanked: 1 time

Back to points, new dizzy, diagrams please?

Post by jlovie » Sat Oct 06, 2018 6:02 pm

Yea mines not quite 50 years yet 38 so close enough,.. Brown was from lumenition to ignition join which then went white n black to pos on coil but also has piggyback to cockpit ignition



jlovie
Posts: 21
Joined: Sat Sep 15, 2018 5:10 pm
Has thanked: 1 time

Back to points, new dizzy, diagrams please?

Post by jlovie » Sat Oct 06, 2018 6:03 pm

As the singular black cable from dizzy is only long enough to reach there I was just hoping would be that simple... Alas it appears not



User avatar
scimjim
RSSOC Member
Posts: 37319
Joined: Sun Oct 01, 2006 10:08 pm
Location: Gloucester
Has thanked: 129 times
Been thanked: 940 times

Back to points, new dizzy, diagrams please?

Post by scimjim » Sat Oct 06, 2018 6:07 pm

No, that would be the positive feed to the lumenition. If it’s only 38, it’s presumably a 6a? In which case, have you got a ballast resistor on the wing by the wiper motor? You need an ignition fed supply (from the ignition switch, originally white) to the ballast resistor, then from the other end of the ballast resistor to the coil +

There should also be a wire going from the starter solenoid to the coil + (this bypasses the ballast resistor when cranking).

Then the coil - output goes to the dizzy.


Jim King

SECURE DRY STORAGE FOR YOUR SCIMITAR

Current: SE5 (8Ball), TI SS1 (snotty), 1600 SS1 (G97), 1600 SS1 (C686CCR), 2.5TD SE5a (diesel 5a), 6 x random other SS1s.
Previous: SE5, 3 x SE5a, 2 x SE6a, 3 x SE6b, GTC, 2.9i GTC, 3 x 1600 SS1, 1300 SS1, Mk1 Ti Sabre, Mk1.5 CVH Sabre
Chief mechanic for: 1400 K series SS1 (Megan3), 1400 CVH EFi SS1 (Grawpy), 1300 SS1 (Number One) & Sarah's coupe.
CURE THE FAULT - NOT THE SYMPTOMS

jlovie
Posts: 21
Joined: Sat Sep 15, 2018 5:10 pm
Has thanked: 1 time

Back to points, new dizzy, diagrams please?

Post by jlovie » Sun Oct 07, 2018 12:13 am

Yea it's an80 gte so last response makes sense, and yea got new ballast resistor at same time incase was fried..., right il give that a bash tomorrow, thanks so much



jlovie
Posts: 21
Joined: Sat Sep 15, 2018 5:10 pm
Has thanked: 1 time

Ballast resistor hot quickly!

Post by jlovie » Sat Oct 20, 2018 1:52 pm

So after auto sparky here, put in new lumenition wired as he thought ect, tried Cranking her over after few tries at starting the ballast resistor and it's metal holder were stinking hot, why? And does this mean he's made an arse of it?.

Cheers



User avatar
peter freeman
RSSOC Member
Posts: 9799
Joined: Thu Aug 31, 2006 12:12 pm
Location: Newcastle
Has thanked: 9 times
Been thanked: 347 times
Contact:

Ballast resistor hot quickly!

Post by peter freeman » Sat Oct 20, 2018 1:57 pm

Sounds like he could have done - mine with lumenition does not get too hot.



jlovie
Posts: 21
Joined: Sat Sep 15, 2018 5:10 pm
Has thanked: 1 time

Ballast resistor hot quickly!

Post by jlovie » Sat Oct 20, 2018 2:06 pm

Bugger, had my suspicions it wasn't right



User avatar
peter freeman
RSSOC Member
Posts: 9799
Joined: Thu Aug 31, 2006 12:12 pm
Location: Newcastle
Has thanked: 9 times
Been thanked: 347 times
Contact:

Ballast resistor hot quickly!

Post by peter freeman » Sat Oct 20, 2018 2:11 pm

Not very clear but might be good enough.
Attachments
lume.jpg
lume.jpg (85.34 KiB) Viewed 920 times



jlovie
Posts: 21
Joined: Sat Sep 15, 2018 5:10 pm
Has thanked: 1 time

Ballast resistor hot quickly!

Post by jlovie » Sat Oct 20, 2018 2:15 pm

Yea actually gave him this to use, but now that I'm looking doesn't really look the same



jlovie
Posts: 21
Joined: Sat Sep 15, 2018 5:10 pm
Has thanked: 1 time

Ballast resistor hot quickly!

Post by jlovie » Sat Oct 20, 2018 2:16 pm

Still curious as to why it got so hot though



User avatar
peter freeman
RSSOC Member
Posts: 9799
Joined: Thu Aug 31, 2006 12:12 pm
Location: Newcastle
Has thanked: 9 times
Been thanked: 347 times
Contact:

Ballast resistor hot quickly!

Post by peter freeman » Sat Oct 20, 2018 2:19 pm

He could have powered the module from the wrong side of the resistor - ie the coil +ve.



jlovie
Posts: 21
Joined: Sat Sep 15, 2018 5:10 pm
Has thanked: 1 time

Ballast resistor hot quickly!

Post by jlovie » Sat Oct 20, 2018 2:27 pm

Fark, that's exactly what's gone on



jlovie
Posts: 21
Joined: Sat Sep 15, 2018 5:10 pm
Has thanked: 1 time

Ballast resistor hot quickly!

Post by jlovie » Sat Oct 20, 2018 2:32 pm

Does that mean module is likely fried now?



User avatar
peter freeman
RSSOC Member
Posts: 9799
Joined: Thu Aug 31, 2006 12:12 pm
Location: Newcastle
Has thanked: 9 times
Been thanked: 347 times
Contact:

Ballast resistor hot quickly!

Post by peter freeman » Sat Oct 20, 2018 2:41 pm

No just running with a low voltage supply.



Post Reply

Return to “General Technical Discussion”