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gauge swap issues

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Old 07-23-2015, 11:16 PM
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Default gauge swap issues

so I swaped out my idiot lights for a full gauge cluster and replaced the sending units and now neither of the gauges work, the oil pressure being i dont have the wires for it or they've been snipped. but i have all of the wires for my coolant temp gauge and it doesnt work either. any tips or tricks?
btw its on an 88 model
Old 07-24-2015, 04:00 AM
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Sensors changed also ?
Old 07-24-2015, 04:46 PM
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i swapped the oil pressure sending unit and the coolant temp sensor to the ones that vary the voltage, if thats what your asking is there any other sensors that need replaced?
Old 07-24-2015, 10:18 PM
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You need sensors for gauges not lights ..Oil pressure switchand coolant temp switch. By distributor for oil and rear drivers side cylinder head for temmp.

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Old 07-25-2015, 10:15 AM
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Originally Posted by freegdr
You need sensors for gauges not lights ..Oil pressure switchand coolant temp switch. By distributor for oil and rear drivers side cylinder head for temmp.
Yeah swaped them both to sensors not switches
Old 07-25-2015, 10:19 AM
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The gauges move when I start it up. The coolant stays about 100 on the gauge and my oil pressure says its about 7, I was wondering if it could be a grounding issue?
Old 07-25-2015, 10:22 AM
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Originally Posted by Tann120
The gauges move when I start it up. The coolant stays about 100 on the gauge and my oil pressure says its about 7, I was wondering if it could be a grounding issue?
Correct sensors installed ?
Old 07-25-2015, 10:43 AM
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That's what came up at the parts store, I tested the coolant sensor on the back of the block with a lighter and a multimeter
Old 07-25-2015, 11:02 AM
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Ground the connectors to metal turn key on see if gauges peg to right .
Old 07-25-2015, 11:22 AM
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Alright I'll do that when I get home, will this tell me if my gauges are working correctly or what will this diagnose?
Old 07-25-2015, 01:41 PM
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i did the test and my oil pressure went all the way to the right and my coolant went about half, when i was driving my oil pressure was at 20 then dropped back down to 0 could that mean its not getting a good ground on the oil pressure?
Old 07-26-2015, 12:13 AM
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Do you still have part numbers for installed sensors ?
Old 07-26-2015, 02:24 AM
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I can check in the morning if I still have the receipt, I know I have the boxes
Old 07-26-2015, 06:04 AM
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Originally Posted by Tann120
I can check in the morning if I still have the receipt, I know I have the boxes
boxes even better....
Old 07-26-2015, 11:16 AM
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Coolant temp sensor is: s320
Oil pressure sending unit is: S4185
I got them at orileys


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