Tachometer is way off.
#1
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?
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?
#2
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.
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
So, assuming that you have a V6 dash harness transplanted into your 2000 2.5 truck, you'd need to disconnect the black/yellow ground from pin 8 of C216.
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:
- pin 8 of the 10-pin: (NOT connected to anything)
- pin 16 of the 16-pin: (wired to chassis ground)
6-cylinder: "Selector" ground configuration:
- pin 8 of the 10-pin: (wired to chassis ground)
- pin 16 of the 16-pin: (NOT connected to anything)
4-cylinder: There is no "Selector" ground
- pin 8 of the 10-pin: (NOT connected to anything)
- pin 16 of the 16-pin: (NOT connected to anything)
#3
#5
#6
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.
#8
My problem was with swapping out a wiring harness.
#9
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.
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?
#10
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.
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.
No.
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.
#12
OK now that I have the 02 explorer sport cluster in my 2000 ranger every thing works but the check engine light is this common on this swap?
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#21
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
Thank you, BR
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