Go Back   F150online Forums > Powertrain & Mechanical > V6 Engines (including Ecoboost)
Sign in using an external account
Register Forgot Password?
Register Photos Vin Decoder FAQ Members Search Today's Posts Mark Forums Read Vendor DirectoryGarage

Welcome to F150Online Forums!
Welcome to F150Online.com.

You are currently viewing our forums as a guest, which gives you limited access to view most discussions and access our other features. By joining our community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join the F150Online Forums community today!





Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
  #1  
Old 12-10-2001, 01:45 AM
Senior Member
Garage is empty, add now
 
Join Date: Oct 2001
Location: CA Morro Bay
Vehicle: 2000 ford f-150
Posts: 119
Tachometer Signals

Where can I pick up a signal to run a tach and what type of tach can be ran.

Auto meter said to run a single cylinder tach on one of the coils but the multispark at low rpms will make the tach jump until rpm are up into the 3000 range

Can the crank position sensor be used somehow to trigger the tach, it puts out 0.1 volts (A/C)which varies with rpm and also drops every time the missing tooth comes around

Last edited by V6runner; 12-10-2001 at 03:30 AM.
Reply With Quote
  #2  
Old 12-10-2001, 09:56 AM
Member
Garage is empty, add now
 
Join Date: Jun 2001
Location: Austin, TX
Posts: 34
If you go into the "other aftermarket" section, there are several installation guides in there.

I just put one in last weekend and it was easy. There is a signal wire in the 16-pin wire harness (large middle one) found when you take out the instrument panel (very easy to do). It is the White wire with Pink striping. Just tap into that wire and you will have your signal.

Oh, and I used a Sunpro from Autozone. I know I should have gone with a better one but I bought it about 8 months ago and just never got around to installing it. I thought it was difficult.

Hope that helps.
Reply With Quote
  #3  
Old 12-10-2001, 11:01 AM
Senior Member
Garage is empty, add now
 
Join Date: Oct 2001
Location: CA Morro Bay
Vehicle: 2000 ford f-150
Posts: 119
tach signal

on the back of the tach what is the tach set to run on
1 cylinder or 6
Reply With Quote
  #4  
Old 12-10-2001, 11:42 AM
Senior Member
Garage is empty, add now
 
Join Date: Mar 2001
Location: Palm Coast, FL, USA
Vehicle: 1999 Ford F150
Posts: 208
I think on some 99's and up that didnt come with the tach in the the instrument cluster (hence that is why i assume your hooking up a tach) that wire wont work. Then some one found the pin number coming out of the computer and if you didnt have a tach in the truck then ford never put a pin in the computer. Hooking it up to the coil wont work cause it will give you a very erratic reading. The only way i know how to do it on newer trucks is to use an Aftermarket ignition box and hook one up off that. But i hope you find a way to do it, good luck.
__________________
'99 F150 4.2L XL Shortbed 5-speed
'02 Ford Focus ZX3
Reply With Quote
  #5  
Old 12-10-2001, 12:00 PM
Senior Member
Garage is empty, add now
 
Join Date: Oct 2001
Location: CA Morro Bay
Vehicle: 2000 ford f-150
Posts: 119
tach signal

Longhorn ,wondering what year your truck is and if you had a tach in dash to begin with
Reply With Quote
  #6  
Old 12-10-2001, 05:16 PM
Junior Member
Garage is empty, add now
 
Join Date: Dec 2001
Location: Houston, TX
Vehicle: 2001 Ford F-150
Posts: 7
I believe that the Pin in the main PCM harness is #48.

I remember reading a How To of F150World with some detailed instructions on how to install a tach.

Good Luck,
David
Reply With Quote
  #7  
Old 12-11-2001, 11:20 PM
Junior Member
Garage is empty, add now
 
Join Date: May 2001
Location: Austin, US, Texas
Posts: 1
V6runner,

Sorry, this is Longhorn Hoss (just couldn't find my password so I had to use my other login name).

To answer your questions, my truck is a 97 XL F150, 4.2 V6 4x4. I did not have the tach in the truck when I got it, really strange because it is a standard (I've been made fun of before for it).

I found a post from around June of 99 in the aftermarket mods section that led me to remove the instrument panel. Also, many of my friends have told me that the way most car companies work, they usually use a generic wiring harness for all vehicles, then just place the correct instrument panel based on customer needs. Mine had the tach wire in the back, along with a bunch of other wires I didn't care to research into what they were.

Oh, set the switch in the back to 6 (mine has 4,6,and 8). I will say that I had heard that the correct wire, and this was from another post, was the white with pink striping. Just to make sure, I hooked up the power to the tach, then took the signal wire and tapped it to the back of the wiring harness. Revs showed up perfectly.

One last thing! Make sure that you connect the BLACK ground wire to a ground and the GREEN wire to the tach. I was in a hurry, and mistook the GREEN for GROUND! I had the engine running and while I was tapping the different connectors in the back of the harness, one happened to spark, and kill the engine. DOH! Nothing else happened, she started right up, and ran fine, just a little scare.

By the way, what year is your truck?
Reply With Quote
  #8  
Old 12-12-2001, 01:57 AM
Senior Member
Garage is empty, add now
 
Join Date: Oct 2001
Location: CA Morro Bay
Vehicle: 2000 ford f-150
Posts: 119
tach signal

With all the different information given, and looking through some tech books, I understand that the pin number is 48 which is wht/pnk. It can be tapped into from any point along the way from the PCM to the back of the instrument cluster. The model year does not matter 97-00 , can be used with or with out original tach installed, have not checked it for 01. The tach signal fires three signals per rpm for the three coils, which is correct for a 6cyl. tach. The tach must be self powered and not run off tach signal power only, which some old technology tachs use.
My problem remains to be, that bad ink or a color blind engineer was used in making my wht/pnk wire and the pink appears to very dark, near red. The only wht/red wire I can find is used only on the 5.4 V8 for the ignition coils and is not near the intrument cluster. So I assume that I have the right wire.

My assumptions are unproven until I hook up the tach, that I am currently looking for, and all goes well.

My application is a 00 with no original tach

Last edited by V6runner; 12-12-2001 at 02:00 AM.
Reply With Quote
  #9  
Old 12-12-2001, 10:32 AM
Member
Garage is empty, add now
 
Join Date: Jun 2001
Location: Austin, TX
Posts: 34
The reason I went with the instrument cluster is because I did not have a wiring diagram of the vehicle so it was kind of difficult to find the wht/pnk wire. That kind of sucks that the coloring is not quite what it should be. I hope all goes well with the installation. Have you considered which tach you will install?

Oh, V6runner, how much did it cost to swap your gears?
Reply With Quote
  #10  
Old 12-12-2001, 03:34 PM
Senior Member
Garage is empty, add now
 
Join Date: Oct 2001
Location: CA Morro Bay
Vehicle: 2000 ford f-150
Posts: 119
tach

Im looking at one of the auto meter tachs.
5 in. 8,000 rpm external shift-lite either in the sport comp or auto gage model but I see no visible difference in the two only the white printed name and the price.

The gears themselves are $150
Install kit seals, shims, shim holders, bearing, ring bolts, crush sleave are $70
Extra crush sleave from ford $8, one backup so I don't have to wait for another if the pinion drag is too much and have to start over

Also noticed that factory pinion seal leaked and rusted pinion to pinion bearing inside diff were oil should be and water should not,
made the job alot more fun breaking it loose.
Reply With Quote
  #11  
Old 12-13-2001, 09:59 AM
Senior Member
Garage is empty, add now
 
Join Date: Nov 2000
Location: colorado springs, coloado
Vehicle: 1997 Ford F-150
Posts: 120
V6, Who did you get your gears from?
__________________
97 std. long bed
mod. MAF, ported and polished throttle body, intake,cat back with glass pack
2-4 Ground Force drop
6-way power adjust seats
170 rwhp from Superflow
1/4mi@17.543@79.51
60'@2.670
w/power lumbar
Pioneer in dash CD w/4 100w. 3way Pioneer 6X9's
Pretty plain mono-chrome white. http://troy.f150online.net
Reply With Quote
  #12  
Old 12-13-2001, 07:04 PM
Senior Member
Garage is empty, add now
 
Join Date: Oct 2001
Location: CA Morro Bay
Vehicle: 2000 ford f-150
Posts: 119
about the gears

I got them from a local place. When you shop notice where the place is since shipping heavy gears will bump up the price. Off road magazines are loaded with plenty of places, and prices that you can search if no one is local.
Reply With Quote
  #13  
Old 12-30-2001, 10:51 PM
Senior Member
Garage is empty, add now
 
Join Date: Apr 2001
Location: This side of the Milky Way
Vehicle: 1908 Ford Model T
Posts: 1,548
Send a message via ICQ to LeanNCut Send a message via AIM to LeanNCut Send a message via Yahoo to LeanNCut
No tach on a standard? Nothing new. Manufacturers will do anything to save a buck nowadays..
Reply With Quote
  #14  
Old 01-02-2002, 05:25 PM
Senior Member
Garage is empty, add now
 
Join Date: Mar 2001
Location: Austin, TX, USA
Vehicle: 2001 Ford F-150
Posts: 161
i think on the 2001's wiht the digital odo, you cant hook up a tach to the dash harness. i found a wire that had a tach signal, but when i hooked up my tach the signal was all choppy and bad; with the engine idleing smoothly the tach jumped around between 500 and 1000 rpm. when i use the odometer tach, it works fine, but this is annoying since its digital and since it resets the trip odo everytime i use it.

if anyone knows how to get around this without messing with the computer, please let me know. i really dont want to destroy my $800 computer by soildering on it. thanks.
__________________
-------------------------
2001 F-150 XL Reg Cab, SWB
4.2L, 5-spd, 3.55 4x1
-------------------------
Reply With Quote
Old 01-02-2002, 05:25 PM


 
 
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


All times are GMT -4. The time now is 04:40 AM.


 
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. FordŽ is a registered trademark of the Ford Motor Company
Contact Us Advertising Privacy Statement Terms of Service Jobs Forum Text Archives
Emails & Contact Details

Search Engine Friendly URLs by vBSEO 3.5.2