new guy
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New User
Joined: Nov 2012
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new guy
whats up guys , the name is skylar,heres a pic of my rig...
bought an after market tach for the truck and had a few questions......
say run the red wire to a pos source wghen the ignition is on....any one know what color wire in the dash i coudl use for that?.......i have the inline 6 300..it say run the green wire to the coil? is that right?....then i run a ground........also say run the the white to a night lamp...wich wire wopuld that be?....i know its alot of questions but i am brand new to trucks this old of a truck and am getting to know things slowly but steadily!
thanks for yall help!
bought an after market tach for the truck and had a few questions......
say run the red wire to a pos source wghen the ignition is on....any one know what color wire in the dash i coudl use for that?.......i have the inline 6 300..it say run the green wire to the coil? is that right?....then i run a ground........also say run the the white to a night lamp...wich wire wopuld that be?....i know its alot of questions but i am brand new to trucks this old of a truck and am getting to know things slowly but steadily!
thanks for yall help!
More Turbo
Joined: Mar 2012
Posts: 724
Likes: 26
From: Southeast Salt Lake, UT
Welcome to FTE. I like the color. 
The radio lead is a easy key on wire to find and the light wire can probably just be spliced in with the light that illuminates the panel above the wiper and headlight switches.
The radio lead is a easy key on wire to find and the light wire can probably just be spliced in with the light that illuminates the panel above the wiper and headlight switches.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Answers to questions:
1) GREEN wire on tach goes to coil negative (TACH TEST) terminal. It does not go to the distributor on an electronic ignition setup (factory on your 79).
2) Dimmer switch on the floor has nothing to do with the dash lights; whoever told you otherwise is wrong. Check that you have power on both sides of the dash illumination fuse with the headlight switch pulled out to either stop and the **** turned all the way counter-clockwise.
1) GREEN wire on tach goes to coil negative (TACH TEST) terminal. It does not go to the distributor on an electronic ignition setup (factory on your 79).
2) Dimmer switch on the floor has nothing to do with the dash lights; whoever told you otherwise is wrong. Check that you have power on both sides of the dash illumination fuse with the headlight switch pulled out to either stop and the **** turned all the way counter-clockwise.
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New User
Joined: Nov 2012
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Answers to questions:
1) GREEN wire on tach goes to coil negative (TACH TEST) terminal. It does not go to the distributor on an electronic ignition setup (factory on your 79).
2) Dimmer switch on the floor has nothing to do with the dash lights; whoever told you otherwise is wrong. Check that you have power on both sides of the dash illumination fuse with the headlight switch pulled out to either stop and the **** turned all the way counter-clockwise.
1) GREEN wire on tach goes to coil negative (TACH TEST) terminal. It does not go to the distributor on an electronic ignition setup (factory on your 79).
2) Dimmer switch on the floor has nothing to do with the dash lights; whoever told you otherwise is wrong. Check that you have power on both sides of the dash illumination fuse with the headlight switch pulled out to either stop and the **** turned all the way counter-clockwise.
its is turned all the way counter clockwise.....where is the dash ill light located?
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MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
You're looking for a fuse, not a light. It's in the fuse panel and is labelled. Should be 3 amps. Check it for power using a multimeter or a test light using a known-good ground. Don't just look at it and say that it looks fine. As I said in my previous post, this has to happen with the headlight switch pulled out to one of the two stops (meaning at least the parking lights are on).
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