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#1 |
Registered User
Join Date: Jul 2005
Location: south bend, indiana
Posts: 15
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guage wiring question?
can anyone tell me if i change my cluster guages for a model with built in tach complete w/ printed circuit is it a bolt in? or in other words were all the trucks hard wired the same but used the circuit board to get the signals to where they need to go. thanks for any advice.
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#2 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: guage wiring question?
nope some wires need to move
gas gauge wires move,tach wires up alone
__________________
John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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#3 |
Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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Re: guage wiring question?
Depends on year, my 76 was plug-n-play with no changes needed
Posted via Mobile Device
__________________
2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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#4 |
Registered User
Join Date: Nov 2009
Location: Sherman, ME
Posts: 2,359
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Re: guage wiring question?
It depends on whether or not your truck was originally wired for warning lights or gauges as well as the year of the truck and year of the cluster.
If you truck was originally wired for a warning light cluster, you will have to re-arrange some wires to install any factory gauge cluster (either with or without tach). If your truck was originally wired for gauges but without a tach, a tach cluster can be a direct plug-in swap. The key to making it a plug-in swap is getting a compatible year range tach cluster. Compatible year ranges are: 1973 - 1975 = cluster has an ammeter and mechanical oil gauge 1976 - 1977 = cluster has a voltmeter and mechanical oil gauge 1978 - up = cluster has a voltmeter and electric oil gauge Note there is a minor difference between the 76 and 77 clusters that has to do with the warning/indicator lights in the little "windows" at the bottoms of the speedometer and tach faceplates. |
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#5 |
Registered User
Join Date: Jul 2005
Location: south bend, indiana
Posts: 15
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Re: guage wiring question?
thanks guys, its a guage cluster not and idiot light one. 78 stepside, i knew tach wired in seperatly, but wasn't sure about others. if i use 78 and up, what years would be simple plug and play? and would blazers or surburbans of the same years work also? thanks again. also on the same track, someone removed the original ac. i replace the evap box and welded in a patch where they butched firewall to make a standard heater work. but need to know if any inside heater/defrost/ac box and controls from about 76 to 80 will work if i replace it all. thanks for any help. first time i've played with a truck, more used to old cars and always try getting ones that are complete. this one not so much.
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#6 |
Registered User
Join Date: Oct 2003
Location: houston, texas
Posts: 1,974
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Re: guage wiring question?
For A/C I would go vintage air since it includes everything you will need inside and under hood
Posted via Mobile Device
__________________
2008 Silverado Z71 RCSB 1991 GMC Jimmy 4x4 1976 GMC Sierra C15 SWB |
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#7 |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: guage wiring question?
the cluster i found has a plastic front piece better the the metal one
not sure if they all come prewired to move the gas over (jumper 7 to 18) and watch the font
__________________
John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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