Does it instantly fry your pressure gauge? I have a 88 fj62 that I have been doing a lot of work on. After removing the oil pressure sender then reinstalling it I hooked up the wire to the spade and started the vehicle. The needle spiked and stayed there. I then disconnected it and hooked it up to the round terminal and the needle doesn't move at all. Is my gauge fried? I know it was stupid not to pay attention to where it came off of but it just seems like that you should hook it up to the spade. Another lesson learned the hard way. If this is the case shouldn't this issue be in the FAQ?
If you wire your oil pressure sender wrong (1 Viewer)
- Thread starter Lewy
- Start date
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I do believe so
Moby
GOLD Star
Yup, it's dead (I did the same thing you did but didn't notice it right away). If you pull the dash and test the gauge with it in the cluster it might actually test OK (mine did). Made me wonder if the gauge was actually my problem. However if you go ahead and guage from the cluster you'll probably be able to see the damange.
REKCUT
SILVER Star
perfect time to add a real gauge. One that has numbers on it.
While on the topic of gages: Can a mechanical temp gage be put in the stock water temp location?
- Thread starter
- #7
Are you saying I need to ground the spade before I get a new gauge and see if that works or ground it just so it doesn't happen again?
They ground just fine through the body into the engine. You could ground the spade, but you don't need to.
Potentially both, but I meant the former: You need to ground the spade before you get a new gauge, and see if that works.
Early units ground to the block through the threads. Later units (and most aftermarket) have the spade ground. The nipple connector in the middle is the signal wire.
When you connected your signal wire to the spade, the gauge acted like you direct-grounded the sensor wire. That suggests that the unit is already grounded (like lehiguy said). And that would mean that grounding the spade would be a wasted effort because the sender is already grounded. But, until you try you'll never know, and 3 minutes with a scrap wire is a lot cheaper than a new gauge.
FWIW, I drove around with a pegged gauge for years because the sender was shorted. New sender -- perfect function. Those gauges are fairly robust.
Try grounding the spade and let us know what happens.
And you could test your gauge by touching the sensor wire to ground. Don't hold it there long.
Yes but use teflon tape
have you tryed to give it a little bash tosee if it comes back because it uses a form of magnetism to move the neadle and it may have over magged the gauge
Fried mine... The hot wire needs to go on the nipple, not the ground tab. I wonder how many people have done this?
- Thread starter
- #14
Grounding the spade didn't do anything. I'm afraid my gauge is toast. The needle sits so far down you can hardly see it. Can someone explain exactly what happens when you accidently ground your gauge. The needle still moves if you ground it but does nothing when hooked up properly. Why would this be? I thought if the gauge was fried the needle wouldn't move no matter what you did.
