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Oil gauge 69 Superbee
#3290750
02/21/25 10:54 AM
02/21/25 10:54 AM
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Joined: Jan 2003
Posts: 44,218
Round Lake Beach, Illinoisy
Rhinodart
OP
Rhinotruck
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OP
Rhinotruck
Joined: Jan 2003
Posts: 44,218
Round Lake Beach, Illinoisy
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We have an oil gauge that won't work in a 69 Superbee. You can put a ground to it and the needle moves up, but hook up the correct way and nothing happens. We have tried three different new sending units, the big bulbuous kind, and none seem to work. Could it be something in the cluster wiring or trace?
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
JB Rhinehart, Realist
A-Body's RULE!
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Re: Oil gauge 69 Superbee
[Re: stumpy]
#3290764
02/21/25 12:47 PM
02/21/25 12:47 PM
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Joined: Jan 2003
Posts: 11,127
North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 11,127
North Dakota
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Did you hook a test light to the sender wire to see if it blinks. If it does try grounding the wire and then turning on the key. Watch to be sure if the gauge moves up you don't allow it to peg or you will burn out the gauge. Are the threads on the sender and block clean? Agreed. This is the best down and dirty test. You can do it at the sender terminal with the sendor connected. If your test light doesn't start flashing, based on what else you have tried, you have a wiring problem, I'd guess the bulkhead connector..
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Oil gauge 69 Superbee
[Re: 6PakBee]
#3290797
02/21/25 03:44 PM
02/21/25 03:44 PM
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Joined: Dec 2004
Posts: 2,381
Wheatfield, NY
Cuda340
top fuel
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top fuel
Joined: Dec 2004
Posts: 2,381
Wheatfield, NY
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Do the other gauges work (not counting the amp gauge)?
The gauges operate at 5V. There is a voltage limiter plugged into the gauge cluster. Use the test light as mentioned above to see if it blinks. If it does the voltage regulator is working. The sender wire is just a resistance pathway to ground. Use the nub from the back of the gauge that connects to the printed circuit board to test for power and blinking. You can put 12V to it for a short time (no pun intended) to check gauge functionality. I am assuming this is a Rallye dash. The ohms readings of the gauge are 72 ohms low, 23 ohms mid and 10 ohms high.
Last edited by Cuda340; 02/21/25 03:56 PM.
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Re: Oil gauge 69 Superbee
[Re: Cuda340]
#3290820
02/21/25 05:43 PM
02/21/25 05:43 PM
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Joined: Jan 2003
Posts: 44,218
Round Lake Beach, Illinoisy
Rhinodart
OP
Rhinotruck
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OP
Rhinotruck
Joined: Jan 2003
Posts: 44,218
Round Lake Beach, Illinoisy
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Do the other gauges work (not counting the amp gauge)?
The gauges operate at 5V. There is a voltage limiter plugged into the gauge cluster. Use the test light as mentioned above to see if it blinks. If it does the voltage regulator is working. The sender wire is just a resistance pathway to ground. Use the nub from the back of the gauge that connects to the printed circuit board to test for power and blinking. You can put 12V to it for a short time (no pun intended) to check gauge functionality. I am assuming this is a Rallye dash. The ohms readings of the gauge are 72 ohms low, 23 ohms mid and 10 ohms high. Yes the other gauges work.
The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.
JB Rhinehart, Realist
A-Body's RULE!
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Re: Oil gauge 69 Superbee
[Re: Rhinodart]
#3290828
02/21/25 06:27 PM
02/21/25 06:27 PM
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Joined: Jan 2003
Posts: 5,496
So Cal
Sinitro
master
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master
Joined: Jan 2003
Posts: 5,496
So Cal
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We have an oil gauge that won't work in a 69 Superbee. You can put a ground to it and the needle moves up, but hook up the correct way and nothing happens. We have tried three different new sending units, the big bulbuous kind, and none seem to work. Could it be something in the cluster wiring or trace? Something doesn't make sense..  If the guage needle moves up when the under the hood sending unit wire is grounded, means that the voltage limiter is working and the guage is OK.The sending unit is a variable resistor that adjusts the voltage to the guage, do not use any teflon tape on the sending unit as then it will not be grounded. Just my $0.02... 
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Re: Oil gauge 69 Superbee
[Re: Rhinodart]
#3290873
02/21/25 10:49 PM
02/21/25 10:49 PM
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Joined: Jan 2003
Posts: 16,341
Omaha Ne
TJP
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,341
Omaha Ne
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We have an oil gauge that won't work in a 69 Superbee. You can put a ground to it and the needle moves up, but hook up the correct way and nothing happens. We have tried three different new sending units, the big bulbuous kind, and none seem to work. Could it be something in the cluster wiring or trace? silly question, have you verified the oil pressure with a known good mechanical gauge? that would be the first step. number 2 would be to check the resistance reading at the sending unit with the motor running keep us posted 
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