Tachometer
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New User
Joined: Apr 2003
Posts: 8
Likes: 0
Tachometer
I just bought a 1985 F-350 and the tach does not work. Is there anyway to trouble shoot it to determine if it is the sensor or the tach gauge? I appreciate any information or experience.
Thanks.........
Thanks.........
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Tachometer
If you have a 12V power supply or battery you can carry indoors, pull the tach & wire it up with the signal terminal hooked to your speaker wires on your stereo. You can use it to put out a specific frequency & amplitude to simulate the signal it normally recieves. GoldWave is a great shareware program that will generate a .wav file to play off the computer thru the stereo so you can decide what frequency to send it. I've done it to rack up miles on a PSOM (electronic speedometer). 
Tachometer
Elder User
Joined: Feb 2003
Posts: 871
Likes: 0
From: Coleman, Wisconsin
Tachometer
Since your talking about tachs here, I'll ask. What is involved in hooking up a tach to an engine that never had one? If I bought one from AutoZone would I have to buy anything else?? Thanks
Lead Driver
Joined: May 2000
Posts: 9,236
Likes: 12
From: Senoia, GA
Tachometer
If the tach doesn't come with wires you will need black wire(-)neg. red wire (+) pos. green wire (to the tach) and blue wire (to your dimmer switch). Just ground the black wire to the body of the truck. Connect the pos. wire to your fuse box, the best place is the radio. DO NOT connect directly to your battery. Connect the blue wire into your dimmer switch in your headlight switch. Lastly run the green wire into the engine compartment. . .look on your coil and there are 2 wires coming off of it, there will be a pos and a neg sign on the plastic cap, attach the wire from the tach to the pos wire. and that should work. . .now the green and blue wires may not be the same, but that is what it was for both of my trucks. Any other questions e-mail me at RedneckCadet@Netscape.net
-Jason-
-Jason-
