Tachometer is way off.
So I installed some Explorer Sport gauges a long long time ago (like 6 or 7 years ago) and the tach worked perfect. Idle was right on and so was redline. But just recently the the tach is showing idle around 400 RPMs and Redline is around 4000 something.
Just recently I changed out my GEM and wiring harnesses from another ranger with power doors. But I looked at my wiring manual and it showed that the tach signal is coming straight from the PCM. So what could be the problem? |
Correct. The tach pulse comes directly from the PCM.
However, the ground wires present in the cluster connector of the dash harness determine if the Ranger/Explorer tach is calibrated for a 4, 6 or 8 cylinder engine. If you swapped a V6 dash harness into your 4-cylinder truck, the tach will read 2/3 of actual RPM because of the lower number of pulses/revolution.
Originally Posted by rwenzing
96~2003 Ranger tachometer wiring for 4, 6 or 8 cylinders: 8-cylinder: "Selector" ground configuration:
6-cylinder: "Selector" ground configuration:
4-cylinder: There is no "Selector" ground
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Brilliant answer! I just noticed that little box next to the ground wire that reads "3.0 and 4.0", and it was a V6 donor harness. I take it you had to mod yours for your V8 conversion.
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Don't mean to hijack, but yes I do. What about for a 95? I can't find much info on that.
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Originally Posted by sheltonfilms
(Post 1858148)
I take it you had to mod yours for your V8 conversion.
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Originally Posted by 95lorange
(Post 1858210)
Don't mean to hijack, but yes I do. What about for a 95? I can't find much info on that.
Based on what was done in 94 and 96, here's my best GUESS for 1995. A black/yellow wire to ground from pin #1 of the 14-pin calibrates the tach for a 6-cylinder; no ground from pin #1 of the 16-pin sets the tach up for a 4-cylinder. Remember, this is an unproven guess, nothing more. |
OK so if I understand this its just plug and play to put in an instrument panel with a tach in my 2000 with 2.5 in it ranger?
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Originally Posted by mojeeper
(Post 1885846)
OK so if I understand this its just plug and play to put in an instrument panel with a tach in my 2000 with 2.5 in it ranger?
My problem was with swapping out a wiring harness. |
Originally Posted by rwenzing
(Post 1858224)
Compared to the years before and after, 1995 uses a unique cluster and a unique harness pinout and it is not clear in the 95 EVTM how the tach difference between 4 cylinder and 6 cylinder trucks is accommodated.
Based on what was done in 94 and 96, here's my best GUESS for 1995. A black/yellow wire to ground from pin #1 of the 14-pin calibrates the tach for a 6-cylinder; no ground from pin #1 of the 16-pin sets the tach up for a 4-cylinder. Remember, this is an unproven guess, nothing more. wouldn't that make it the same? as what you said above? |
Originally Posted by StxDangerRanger
(Post 1885909)
Originally Posted by rwenzing
(Post 1858224)
Compared to the years before and after, 1995 uses a unique cluster and a unique harness pinout and it is not clear in the 95 EVTM how the tach difference between 4 cylinder and 6 cylinder trucks is accommodated.
Based on what was done in 94 and 96, here's my best GUESS for 1995. A black/yellow wire to ground from pin #1 of the 14-pin calibrates the tach for a 6-cylinder; no ground from pin #1 of the 16-pin sets the tach up for a 4-cylinder. Remember, this is an unproven guess, nothing more.
Originally Posted by StxDangerRanger
(Post 1885909)
wouldn't that make it the same? as what you said above?
The 1995 cluster appears outwardly identical to the 96~2003 style clusters but there are differences in the 95 cluster itself and its connector pinouts. |
Thanks for the reply Anthony thats what I plan on doing to mine
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Originally Posted by sheltonfilms
(Post 1885892)
Yeah that is correct. I put in an Explorer Sport white faced cluster in mine and it was plug and play. Probably the easiest mod I've ever done.
My problem was with swapping out a wiring harness. |
By saying that the light doesn't work do you mean that its on?
Have your codes read if it is. |
Originally Posted by sheltonfilms
(Post 1894323)
By saying that the light doesn't work do you mean that its on?
Have your codes read if it is. |
Did your check engine light come on before the swap?
Does it not come one when you first turn your ignition on? |
[QUOTE=sheltonfilms;1894329]Did your check engine light come on before the swap?
Does it not come one when you first turn your ignition on?[/QUOTE yes Im sure it came on before the swap and no it dont come on when you first turn on the ignition |
Ok looks like the is a pinning difference. Let me double check all the wires for both models and see if others are switched too.
Edit: For some reason I was looking at a 95 Ranger diagrams (got confused with above posts) |
Pins on 2000 2.5 and 2002 sport look identical. Check engine light pin is the same. I would say you have a bad bulb.
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Originally Posted by sheltonfilms
(Post 1894343)
Pins on 2000 2.5 and 2002 sport look identical. Check engine light pin is the same. I would say you have a bad bulb.
Brent |
Originally Posted by mojeeper
(Post 1894348)
Ill pop it out and change it and see what that does thanks for the help
Brent Thanks for all the help Anthony |
Tach starts at 3400rpm
I'm sorry, I have not done any modifications to my truck. Over the past 6 months my Tach would sometimes jump to 3400rpm and then drop back to accurate RPM's (2000). Now it has stuck at the jump spot (3300-3400rpm). Does anyone REALLY know what causes this?
Thank you, BR |
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