Temp and tach after v8 swap

[steven]

I am needing some help with wiring or ideas, I swapped mustang 5.0 with Ron Francis harness in 92 ranger and I want to use factory gauges. First is temp gauge, I don't know which wire in engine bay that was hooked to gauge sending unit? I am assuming it entered in the cab on driver side. Wanting to also use factory tach, not sure how or which wire to use for that. The ron Francis harness has a green wire that would go to tach but not sure if will work with factory tach.

 

[RonD]

In 1992 Ford used a Black/light blue stripe wire for Temp Sender

1992 Tach wire is the same tan/yellow wire used in most years that would hook up to Coil "-", which should be the Green Wire you describe

But don't think the factory Tach will work as is with a V8
Ford did use clusters with jumpers for V6/V8 but in Explorers, Rangers had 4cyl option but you could get lucky, have a look at the back of cluster/tachometer

There is this post: https://www.therangerstation.com/forums/index.php?threads/hooking-up-factory-tach-for-a-v8.4680/

Dakota Digital makes this unit: https://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=1192/mode=prod/prd1192.htm
It can be used to calibrate Tachometers

 

[steven]

R

In 1992 Ford used a Black/light blue stripe wire for Temp Sender

1992 Tach wire is the same tan/yellow wire used in most years that would hook up to Coil "-", which should be the Green Wire you describe

But don't think the factory Tach will work as is with a V8
Ford did use clusters with jumpers for V6/V8 but in Explorers, Rangers had 4cyl option but you could get lucky, have a look at the back of cluster/tachometer

There is this post: https://www.therangerstation.com/forums/index.php?threads/hooking-up-factory-tach-for-a-v8.4680/

Dakota Digital makes this unit: https://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=1192/mode=prod/prd1192.htm
It can be used to calibrate Tachometers

Ron

In 1992 Ford used a Black/light blue stripe wire for Temp Sender

1992 Tach wire is the same tan/yellow wire used in most years that would hook up to Coil "-", which should be the Green Wire you describe

But don't think the factory Tach will work as is with a V8
Ford did use clusters with jumpers for V6/V8 but in Explorers, Rangers had 4cyl option but you could get lucky, have a look at the back of cluster/tachometer

There is this post: https://www.therangerstation.com/forums/index.php?threads/hooking-up-factory-tach-for-a-v8.4680/

Dakota Digital makes this unit: https://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=1192/mode=prod/prd1192.htm
It can be used to calibrate Tachometers

Ron, thanks so much for your help, spot on with the correct wires saved me alot of headaches.

Have one more brain teaser, looking for the wire that would have went to the factory check engine light, would have ran from original ecm to dash light?

 

[85_Ranger4x4]

In 1992 Ford used a Black/light blue stripe wire for Temp Sender

1992 Tach wire is the same tan/yellow wire used in most years that would hook up to Coil "-", which should be the Green Wire you describe

But don't think the factory Tach will work as is with a V8
Ford did use clusters with jumpers for V6/V8 but in Explorers, Rangers had 4cyl option but you could get lucky, have a look at the back of cluster/tachometer

There is this post: https://www.therangerstation.com/forums/index.php?threads/hooking-up-factory-tach-for-a-v8.4680/

Dakota Digital makes this unit: https://www.dakotadigital.com/index.cfm/page/ptype=product/product_id=1192/mode=prod/prd1192.htm
It can be used to calibrate Tachometers

Dakota Digital adapter is spendy but works great in my '85.

 

[RonD]

CEL in 1992 used a Tan/red stripe wire from cluster to OBD1 connector in engine bay
Then a pink/light green wire from OBD1 connector to pin 17 on computer

 

[Maui-sprint]

I plan to use a factory tach as well in my project. Was able to dig this up on TRS: