tach hookup
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Originally Posted by 7.3 motorhome
it is a E 450 so this should be a Van Body also on that diagram of the pcm what does cto tap mean?
A look up gives:
<dl><dt>CTO: </dt><dd>Acronym for coolant temperature override switch</dd></dl>But this can not be right for pin 19.
Last edited by subford; Nov 1, 2007 at 10:03 AM.
New User
Joined: Jan 2008
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Likes: 24
I'll print and post my copy.
My presumption that ford used the same harnesses with models like they did in yesteryear may have been at work here.
I found this in the manual though.
again for F-series.
KG3 CHECK POWER TO TACHOMETER
Disconnect large white instrument cluster harness connector.
Key on, engine off.
Measure voltage of Circuit 640 (R/Y) between Pin 6 on the large white instrument cluster harness connector and ground.
Key off.
My presumption that ford used the same harnesses with models like they did in yesteryear may have been at work here.
I found this in the manual though.
again for F-series.
KG3 CHECK POWER TO TACHOMETER
Disconnect large white instrument cluster harness connector.
Key on, engine off.
Measure voltage of Circuit 640 (R/Y) between Pin 6 on the large white instrument cluster harness connector and ground.
Key off.
Last edited by Mil1ion; Nov 1, 2007 at 03:13 PM.
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Joined: Jan 2001
Posts: 57,025
Likes: 2,756
From: Virginia
Originally Posted by Mil1ion
I'll print and post my copy.
My presumption that ford used the same harnesses with models like they did in yesteryear may have been at work here.
I found this in the manual though.
again for F-series.
KG3 CHECK POWER TO TACHOMETER
Disconnect large white instrument cluster harness connector.
Key on, engine off.
Measure voltage of Circuit 640 (R/Y) between Pin 6 on the large white instrument cluster harness connector and ground.
Key off.
My presumption that ford used the same harnesses with models like they did in yesteryear may have been at work here.
I found this in the manual though.
again for F-series.
KG3 CHECK POWER TO TACHOMETER
Disconnect large white instrument cluster harness connector.
Key on, engine off.
Measure voltage of Circuit 640 (R/Y) between Pin 6 on the large white instrument cluster harness connector and ground.
Key off.
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