oil temp combo gauge bench testing, what am I doing wrong (question answered) next: calibrate the gauge |
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oil temp combo gauge bench testing, what am I doing wrong (question answered) next: calibrate the gauge |
malcolm2 |
Oct 14 2014, 09:00 PM
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#1
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
I have had this gauge for a while. I also found the complete taco plate, sender etc... to set it up. I decided to test it. I tested the sender a while back in hot water and remember getting various readings as the temp increased.
I pulled out my 12v powered drill battery, put 12v + on the + terminal of the gauge and the - on the - of the gauge. ( you can't see the - wire in the picture, but it is there) The gauge moved to where it is in the picture without the sender even being connected. It did not move once the sender was connected. Inside the temp gauge are the following #s. Far left 30, at the start of the red line 156.7 and the end of the red line 170 *C The top of the paper is what is stamped on each face of the hex and the gauge part # has been edited to what you see in the picture. 1. why is the gauge moving at room temp with or with out the sender? 2. do I have this thing hooked up right? any alternate testing suggestions? 3. do I have a matched sender & gauge? |
bdstone914 |
Oct 15 2014, 09:57 AM
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#2
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bdstone914 Group: Members Posts: 4,526 Joined: 8-November 03 From: Riverside CA Member No.: 1,319 |
With either battery just jump from the G to - on the back of the gauge with the positive and negative wires connected to the battery. I think it will peg the gauge. It sounds like you gave a weak short to ground on the G terminal. Take that part of the gauge out and inspect it. You may have something touching the case and the G terminal. The gauge is responding to a signal when there should not be a signal.
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malcolm2 |
Oct 15 2014, 11:47 AM
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#3
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Advanced Member Group: Members Posts: 2,745 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States |
The gauge is responding to a signal when there should not be a signal. Thanks Bruce, That is a good way to put it, I do understand that. Last night I took the 4 screws out of that part of the gauge and removed it from the case. That is how I found the # along the top edge marking the beginning and the red section. I reinstalled it, but I will remove it once more and take a closer look at the guts of this individual gauge. And I will try your suggestion. It is alittle easier to just connect the G term. to the ground term on the back. |
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