need electrical guru, bug Options

[firstknight13]

ok car runs great!!! then i notice tach not working so i pull over and replace blown fuse. turn on key pop fuse blows . i repeat and same thing happens.... i have all lights , NO turn siganals; NO dash lights; NO NO NO......
with key off and turn signal on left or right side the lights for signaling will go on NOT flash??? if you can help would be appreciated!! (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) I'm not an electrician so tell it to me in simple lingo please (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

[Spoke]

QUOTE (firstknight13 @ Apr 6 2006, 11:04 PM)

i have a tach now but no brake or turn signals. I do have emergency flashers too!!

OK, this is good news. If the Red/White wire is disconnected (my assumption) from Fuse 9, then you would not have turn signals. I assume that you have the Black/Yellow wire disconnected which power your brake lights and reverse lights.

The flashers working show another positive. When you put on your flashers, the flasher circuit and turn signal lights get powered by Fuse 11. If this is working and lights in front and rear are blinking, then this should indicate that the turn signals and their wiring are ok including the Red/White wire.

This would leave just the Black/Yellow wire as suspect. The Black/Yellow wire goes to your brake switch and reverse switch on the tranny.

Here is where a multimeter really comes in handy. Check the resistance of the Black/Yellow wire to ground. Since the only loads are the brake switch and reverse switch (also oil temp gauge and voltmeter), you should see a non-zero resistance to ground. If you don't have a voltmeter or oil temp gauge, you should read nearly infinite ohms (open circuit). If you see near-zero resistance, there is a short somewhere on this wire. Check the wires on or around your brake switch and reverse switch on the tranny.

Note: with any wiring especially 30+ year old wiring, vibration, bendings, overcurrents, and age can damage insulation causing it to become brittle and crack or fall off. Visual inspection of wiring is critical. Also keep in mind that because the insulation is so old, moving wires to look for a problem could cause insulation on other wires to crack. Be gentle with the wires and keep your eyes open for cracked insulation, burnt insulation, loose or disconnected wires and connectors.

Spoke