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A little Griso maintenance - oil pressure sending unit.

not-fishing

not-fishing

Cruisin' Guzzisti
GT Famiglia
Joined
Oct 23, 2012
Messages
173
Location
Folsom, CA
I have been getting the dreaded red oil pressure warning light for the last couple of months. It was easy to diagnose as a sending unit problem because the light stayed on when the key was turned on and before the engine started. I learned to do the little dance of on-off-on, sometimes with a little bike push until the light didn't stay on prior to start.
Last weekend I bit the bullet and pulled the tank. I'd already purchased a new sending unit. It took me a while to find the sending unit hiding up by the alternator. Once I pulled the connection off, a female push on spade fitting, I knew right away it was the fitting. Not wanting to change what is probably a perfectly good sending unit I crimped the fitting with pliers and reattached. This push on terminal connection is not very appropriate when going over a post.
392005_primary.jpg

Maybe next time I'll modify the connector to a female push on bullet connector.
I wonder if the karma of having a spare oil pressure sending unit will cause the existing unit to not have to be replaced.
 
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A week later I'm back into the electrical gremlin hunt. The red oil light came on before startup and stayed on again. Basically it was telling me the CPU doesn't "see" the sending unit. So I'll pull the tank, again, and this time replace the sending unit.
 
After months of not having the dreaded oil pressure sending unit Service light come on it's back with a vengeance. Maybe it was my 35 degree F commute this morning. Maybe it's just the usual gremlin.

While replacing a neutral switch in my V11 Lemans I realized it might be a grounding problem and thoroughly cleaned the contact area and even the threads of both the sending unit and crankcase. The neutral light works with greater authority now.

I guess I'll have to install the new oil pressure sending unit I have (I hate taking off the fuel tank) but I'll do the belt and suspenders of cleaning all the contacts of the sending unit as well as making sure the "nail" electrical connection is properly attached.
 
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