britishrich
Freshman Member
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Hi Folks, First post.....just joined the other day. I did some archive searching and couldn't find what I was looking for.
Update, tach is fixed. See Post #19 for result.
I'm helping a buddy with a '65 Austin Healey 3000 MkIII 6 cyl. My first experience with one. My research tells me it's a BJ8. Tach is dead. I did some troubleshooting and it appears internal to the tach. Car has stock ignition and points, runs fine, but no movement in tach. He has no history of the cars' prior workings.
It had a Pertronix 12VP module in it and I removed it and went back to stock ignition, new points, rotor, condenser, etc. I know the current sensing tach won't play with th Pertronix. No desire to convert tach to voltage sensing. Points set to 0.016" and runs fine.
I removed the tach, cleaned the contacts of the "loop" widget and mating tach contacts. I found and studied those great documents by Mark Olson and David Masucci. I opened the tach and likely have a failed component, but........
I want to test it on the bench to verify it's broken, and verify repair if I can fix it. I was thinking of using a GM dizzy in a vice and hook the tach to a battery(pos gnd), to a 12v test lamp for current loading, then spin the dizzy to see if the tach triggers. Make sense?
Or other suggestions? Either that or ask a friend with a Healey to test it out at his place miles away, but I like my workbench place better.
I have some Jag experience with a fair amount of Lucas knowledge and some Smiths gauge tinkering in the past.
Thanks,
Rich
p.s.
What is the white/black tracer wire for near the coil? It comes from the harness and is pigtailed at a female terminal to another white/black wire about 5" long with a female on it's end. I don't have a complete '65 wiring diagram, only the half that shows the tach and instruments, not the engine bay.
Update, tach is fixed. See Post #19 for result.
I'm helping a buddy with a '65 Austin Healey 3000 MkIII 6 cyl. My first experience with one. My research tells me it's a BJ8. Tach is dead. I did some troubleshooting and it appears internal to the tach. Car has stock ignition and points, runs fine, but no movement in tach. He has no history of the cars' prior workings.
It had a Pertronix 12VP module in it and I removed it and went back to stock ignition, new points, rotor, condenser, etc. I know the current sensing tach won't play with th Pertronix. No desire to convert tach to voltage sensing. Points set to 0.016" and runs fine.
I removed the tach, cleaned the contacts of the "loop" widget and mating tach contacts. I found and studied those great documents by Mark Olson and David Masucci. I opened the tach and likely have a failed component, but........
I want to test it on the bench to verify it's broken, and verify repair if I can fix it. I was thinking of using a GM dizzy in a vice and hook the tach to a battery(pos gnd), to a 12v test lamp for current loading, then spin the dizzy to see if the tach triggers. Make sense?
Or other suggestions? Either that or ask a friend with a Healey to test it out at his place miles away, but I like my workbench place better.
I have some Jag experience with a fair amount of Lucas knowledge and some Smiths gauge tinkering in the past.
Thanks,
Rich
p.s.
What is the white/black tracer wire for near the coil? It comes from the harness and is pigtailed at a female terminal to another white/black wire about 5" long with a female on it's end. I don't have a complete '65 wiring diagram, only the half that shows the tach and instruments, not the engine bay.
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