You are here:

Triumph Repair/TR7, ignition coil


robert spencer wrote at 2014-01-22 23:59:56
Hi Howard a wee update,

checked the voltage across the terminals with car ignition on and got 12.4 Volts, disconnected the -ve, jumped the -ve to ground for a second with a wire and keeping the +ve connected got a really low reading on the meter of 260mV, thought I would get either the 6-8 Volts for an internal resistor or 11-12 Volts for an external fitting. Methinks this coil is faulty Note: connections: -ve wire is white/slate...+ve wire is white/yellow that is the original wiring configuration and therefore more or less confirms that the coil is an original type with inbuilt ballast

Best Regardsbbbbbbbbbbbbbbbbbbbbbbb


Triumph Repair

All Answers

Answers by Expert:

Ask Experts


Howard M. Fitzcharles III


Triumph TR-4 up & Spitfire, and Engine theory


Dealership line mechanic on MG, Triumph, Jaguar for 15 years, Instructor in commercial mechanics school 2 yr. Product information manager for piston and valve manufacture, Instructor & hotline answer man for import car parts importer 15 yrs.

Associate member SAE EAA member

Import Car magazine

ASE Master Auto with L-1 certification up to 2000

©2017 All rights reserved.