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TGPI / GPI troubleshooting (SOLVED) Thu Jul 29, 2021 11:26 pm
thestza
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active member
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hello!
having an issue with a neutral indicator on an aftermarket gauge. in the hopes of someday solving the issue, i've begun troubleshooting individual components to try and isolate the culprit. first up, the TGPI switch itself.
today, after reading through various posts here and at motobrick, i came across a reply from robmack / RBM for how to test the switch. using a multimeter, i began testing for continuity at the male connector for the TGPI where it attaches to the main harness (touching the black lead to the male ground and the red lead to the various yellow/xxx male pins).
robmack / RBM supplied this image of what continuity readings should be on a properly functioning GPI...
my readings came out quite different, however... which is odd because it's a brand new TGPI switch...
![TGPI / GPI troubleshooting (SOLVED) 4371-020821213106](https://2img.net/h/www.motobrick.com/gallery/3/4371-020821213106.jpeg)
so some initial questions:
any help is greatly appreciated.
s
having an issue with a neutral indicator on an aftermarket gauge. in the hopes of someday solving the issue, i've begun troubleshooting individual components to try and isolate the culprit. first up, the TGPI switch itself.
today, after reading through various posts here and at motobrick, i came across a reply from robmack / RBM for how to test the switch. using a multimeter, i began testing for continuity at the male connector for the TGPI where it attaches to the main harness (touching the black lead to the male ground and the red lead to the various yellow/xxx male pins).
robmack / RBM supplied this image of what continuity readings should be on a properly functioning GPI...
![TGPI / GPI troubleshooting (SOLVED) TGPI%252520truth%252520table](https://lh3.googleusercontent.com/-B87bPNES_Y4/VWjcP9MTlwI/AAAAAAAAGCM/a6aRxruLYGM/s800-Ic42/TGPI%252520truth%252520table.png)
my readings came out quite different, however... which is odd because it's a brand new TGPI switch...
![TGPI / GPI troubleshooting (SOLVED) 4371-020821213106](https://2img.net/h/www.motobrick.com/gallery/3/4371-020821213106.jpeg)
so some initial questions:
- any ideas why the readings are this off? (is it possible the TGPI is mis-aligned inside the housing?)
- has anyone ever encountered similar readings?
any help is greatly appreciated.
s
Last edited by thestza on Mon Sep 13, 2021 7:28 pm; edited 2 times in total (Reason for editing : (updated image to match order established in robmack image))