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#1
05-19-2018, 10:22 AM
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68 Rally gauges
Does anyone know how to bench test 68 GTO rally and fuel gauges? Thanks
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67428HO |
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#2
05-20-2018, 06:47 AM
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Yes, by applying 12 volts.
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
05-20-2018, 07:59 AM
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The gauges always work.
Issues will be the circuit sheet, metal case ground to alternator's ground vis chassis ground path, and the 2- row connector wiring order. got notes somewhere... |
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#4
05-20-2018, 08:22 AM
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I know to use a ohm meter,but what are the readings should I be getting? Didn't know if a full 12 volts would cook the gauge or not. Thanks.
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67428HO |
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#5
05-20-2018, 12:17 PM
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a 9 volt and some wires will give safe movement in the gauges if you just want to see if they work. If you want to check accuracy you'll need resistance scales etc and a potential switch to get started.
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#6
05-21-2018, 06:23 AM
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You can apply a full 12 volts safely as when the motor is running the charging system is pumping out 13.5 volts or a tad more .
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! Last edited by steve25; 05-21-2018 at 07:10 AM. |
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#7
04-01-2020, 12:21 PM
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bump
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#8
04-01-2020, 01:11 PM
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I know the gas gauge is 0- 90 ohms. I've used a 50 ohm resistor in the past and should read about 1/2 tank on the gauge or if you have a spare gas sending unit. As for the oil pressure and temp, I don't know what the values are for those, I would try low ohmic values.
But you do have to power the cluster. Basically to test the gas gauge or others, send power to where pin #11 would contact the circuit board and also ground the metal casing, Make a lead with a small alligator clip - attach a length of wire - attach a 50 ohm resistor or spare sending unit and then ground the resistor or sending unit. Gas gauge is where pin #7 would land on the circuit board. The 50 ohm like I said should give reading of about 1/2 tank. If you had a spare sending unit you could move the lever up and down and watch the needle react - lever up = 90 ohms should read Full, lever down = 0 ohms Empty. In fact maybe you could attach a spare sending unit to the temp and or oil gauge and do the same thing? |
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#9
04-01-2020, 01:39 PM
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"...maybe you could attach a spare sending unit to the temp and or oil gauge and do the same thing?"
That's what i'd like to know for bench testing |
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