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Unread 09-11-2011, 12:33 PM   #1
JeepDrew_94
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2000 WJ 
 
Join Date: May 2011
Location: Fountain Inn, SC
Posts: 114
94 YJ electrical issues after Chevy 350 swap

I've got a 94 YJ that i've had back from getting a Chevy 350 and ax15 installed for about a week now. The motor is carbed. None of my stock gauges are working but the aftermarket guages that were installed for the voltage, oil psi and radiator temp gauge work. What could be the problem?

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Unread 09-19-2011, 06:54 AM   #2
JeepDrew_94
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2000 WJ 
 
Join Date: May 2011
Location: Fountain Inn, SC
Posts: 114
Anyone have any idea what could be going on?
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Unread 10-03-2011, 12:24 PM   #3
JeepDrew_94
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2000 WJ 
 
Join Date: May 2011
Location: Fountain Inn, SC
Posts: 114
anyone? still not having any luck and my mechanic is hard to get in touch with
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Unread 10-05-2011, 05:28 PM   #4
neonhomer
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1996 ZJ 
 
Join Date: Sep 2010
Location: Edgewater, FL, Florida
Posts: 453
Odds are they were not hooked up. When the original motor was removed, the PCM was probably removed, which is were some vehicles get their gauge data from. I know that my 94 Caravan has two computers, the PCM for the engine and a BCM for the gauges and interior.

If they didn't hook up the speed sensor to the new transmission, there will be nothing to read. Fuel level is also read from the BCM.
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1996 Jeep Grand Cherokee, 4.0L/42RE/242 - Rebuilt motor w/ Comp cam (4/12), 3.5" Junkyard F>R lift, 31x10.5.x15 M/T's, Spartan Locked D44a, TC & tank skids, F&R adj trackbars, V8 steering arms
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Unread 10-05-2011, 08:56 PM   #5
mylt1
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Join Date: Oct 2005
Location: Virginia
Posts: 5,881
build a custom dash section and install all aftermarket gauges. then they will all work.
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Unread 10-06-2011, 11:38 PM   #6
SnowdogMarc
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1988 YJ Wrangler 
 
Join Date: Aug 2008
Location: Alberta
Posts: 1,323
I just did a 98 4.3 swap into my 88 and all the factory gauges work with the new motor with the exception of the tach I had to swap out. I just replaced the Chevy oil sender with the one from my 2.5 and no problems, didn't have to put in aftermarket ones but if one set is working and the others are not they probably didn't add a second set of pickups for the OP or Temp.
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