Help with Tach install.
Thread Starter
|
Junior User
Joined: Jan 2009
Posts: 80
Likes: 0
From: FLA
Help with Tach install.
I did a search and found in a post to hook the signal wire for the tach to the yellow / tan wire coming from the coil. I did this and nothing. I also did a search for a wiring diagram for behind the radio and couldnt find one. The PO installed a stereo and did not use an adapter he cut all the wires. Any help???
Thanks.
I can post picks if needed.
Thanks.
I can post picks if needed.
Postmaster
Joined: Aug 2004
Posts: 4,004
Likes: 1
From: North of Boston MA
Do you have the rest of the tach wired correctly? You will need a power source and a ground in addition to the tach signal for it to work. You can (but don't have to) have the fourth wire hooked to a power source for the back light. I usually just twist the wire for the light and the 12v power for the tach together and leave the light on all the time.
Also make sure you are using the correct wire from the tach to the tach signal.
I'll go outside in a bit and see what color the wire is on my truck that I have the tachometer hooked to.
Also make sure you are using the correct wire from the tach to the tach signal.
I'll go outside in a bit and see what color the wire is on my truck that I have the tachometer hooked to.
Thread Starter
|
Junior User
Joined: Jan 2009
Posts: 80
Likes: 0
From: FLA
lew52 The signal wire goes to the neg side of coil...
I understand, what color is the neg.? The post I found said it was the yellow / tan.
I am confirming the rest of the wiring now but it sucks with out a diagram. I tied the power and ground into the radio power (ACC) and the ground in. I will change the ground and test it again. Do you need the light to test I have not found A spot to tie that in and tested without it.
Thanks for the input.
I understand, what color is the neg.? The post I found said it was the yellow / tan.
I am confirming the rest of the wiring now but it sucks with out a diagram. I tied the power and ground into the radio power (ACC) and the ground in. I will change the ground and test it again. Do you need the light to test I have not found A spot to tie that in and tested without it.
Thanks for the input.
Thread Starter
|
Junior User
Joined: Jan 2009
Posts: 80
Likes: 0
From: FLA
With the key on both have 12vdc??? Is this possible. I checked it grounded at Battery.
Trending Topics
Postmaster
Joined: Aug 2004
Posts: 4,004
Likes: 1
From: North of Boston MA
I just looked at my truck and the wire you are connected to in the photo is the same one I have my tach hooked to. I'd start looking at the rest of the wiring. I wouldn't use the radio ground - go to a good ground somewhere under the dash. Also, for power, make sure you get switched power, not something that is always hot.
The tach wire that is for the light can be twisted together with the power wire as long as you don't want to dim the light with the dash lights. I wired the one in my truck right to the dimmer for the dash lights. Works nicely and wasn't too bad to do.
The tach wire that is for the light can be twisted together with the power wire as long as you don't want to dim the light with the dash lights. I wired the one in my truck right to the dimmer for the dash lights. Works nicely and wasn't too bad to do.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Postmaster
Joined: Aug 2004
Posts: 4,004
Likes: 1
From: North of Boston MA
Glad you got it up and running. I like where you put your. I was going to use that location except the P.O. used it to install some switches for lights that aren't on the truck any more.....I mounted mine to the side of the steering column.
Thread Starter
|
Junior User
Joined: Jan 2009
Posts: 80
Likes: 0
From: FLA
Nitramjr thanks for the help. Here it is all buttoned up.
I really need a new instrument cover but there are other things I want worse. Glued it all up and its one piece again. I would have felt bad if I cut up a pristine piece but I had nothing to lose. The tach was free, I would have purchased one that mounted a little different.
I really need a new instrument cover but there are other things I want worse. Glued it all up and its one piece again. I would have felt bad if I cut up a pristine piece but I had nothing to lose. The tach was free, I would have purchased one that mounted a little different.
Postmaster
Joined: Aug 2004
Posts: 4,004
Likes: 1
From: North of Boston MA
Let's see a picture of your aftermarket tach install for comparison.