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| OEM Tech Discussion Forum for OEM (Original Equipment) or stock XJs and MJs. |
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#1
April 14th, 2010, 18:36
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instrument cluster electrical issue
Help, i cant find my FSM. on Saturday I broke the wire of the oil pressure sending unit. Today the speedo, tach and gas gauge went dead. The temp gauge and volt meter still work and the low gas light is on.
Could the oil sending unit wire have grounded out and killed something. I dont have a wiring diagram and it seems weird that these wouldn't all be on the same fuse. I pulled the cluster and all the plugs are in place. any help would be appreciated. Sean 94 XJ 4.0, AW4, NP231 Last edited by sdigs; April 14th, 2010 at 19:14. Reason: add stats 
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#6
April 14th, 2010, 19:45
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Re: instrument cluster electrical issue
Wouldn't have "grounded out" to cause a problem, that would just cause it to read a wacky value. "grounding out" and "shorting out" are specific failures not generic terms for "something electrical done ****ed up"
 (sorry, as an electrical engineer it really grinds my gears when people abuse terms like that, it'd be like me using the term "backlash" for anything wrong with someone's gear pattern, including bad bearings) My bet is that the connector on the back of the instrument cluster came loose or needs to be cleaned. The tach and speedo signals (at least on a 96) are on wires which are connected to adjacent pins in the connector.
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My yard looks like Sanford & Sons. Current crapcan fleet: LS swapped bobbed 79 J10 Honcho, 4x4 auto 4.0 8.25 swapped metric ton 88 MJ CTeunuch: Sometimes I really wonder if this sport makes you insane, or it just attracts the mentally unstable.
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#7
April 14th, 2010, 21:10
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Re: instrument cluster electrical issue
I'm with Kastein, probably just coincidental with the busted oil pressure sender.
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