---- Jeffrey Gayton <jtgayton@icloud.com> wrote:
> But at Dave's suggestion, I took a closer look at the battery and found
> markings behind the posts. I've got a positive earth car! Thanks again for
> everyone's help. Now I can order some LED tail lights.
Apologies if this is too obvious for words: Now would be the time to consider
whether you want to stay opposite to the rest of the world or convert to
negative ground. We're fortunate to have Litezupp that makes positive ground
LED bulbs; but the vast majority of aftermarket accessories are strictly
negative ground. Even just adding an outlet to charge your cell phone is extra
hassle with positive ground.
I once saw a buddy burn up the wiring harness in his MGA, because it didn't
occur to him that the CB radio he had borrowed had a (negative) ground path
through the antenna clamp. It worked at first, because the bumper bolts were
too rusty to conduct. So we were hundreds of miles from home when the one of
the bolts rubbed through the rust and the cockpit filled with smoke rolling
down the freeway. You might say it made an impression on me!
The conversion from positive to negative ground is pretty trivial on the TR2-4.
Just swap the wires at the coil, ammeter and battery; then repolarize the
generator. If you forgot to swap at the coil, you'd probably never notice the
difference. And if you forget to swap at the ammeter, it just reads backwards.
Repolarizing the generator sounds scary, but it's trivial as well. Just pull
the wire off the 'F' terminal at the control box, and brush it against the 'A'
terminal next to it. You'll see some small sparks to tell you the connection
was made. Then put the wire back on 'F', close the hood and take a drive.
- Randall
** triumphs@autox.team.net **
Archive: http://www.team.net/archive
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