getbent

I recently bought an 88 pathfinder 2 dr 3.0L 5 spd. we replaced the engine and found the fuel and temp gauges don't work, I checked the fuses and and all wire conections and couldn't find anything wrong, does any one have any sudjestions?

88pathoffroad

The 8V voltage regulator on the top, back side of the gauges is shot. Both those gauges run off the same voltage regulator so that's how you can tell when it's shot. A new one from Nissan will probably run you $20 but a generic 8VDC regulator at Radio Shack will cost you $1 if you can solder some wires onto the terminals of it. It's an easy swap. The regulator is the little squarish aluminum box with yellow, blue and black wires coming out of it. You have to take the gauges out to get at it. Takes a Philips screwdriver and 15-20 minutes.

Here, take a look (PDF file, takes Adobe Acrobat or a similar PDF reader to open):

http://nissan.damagedreality.com/NissanVoltRegFix.pdf

__________________
Admin of NPORA, mod for Nissan-Infiniti Forums, NissanForums.com, NissanHelp.com, AllNissans.com and VGPowered Forums
'88 Pathfinder: 6" of lift, 33x13.50 Swamper LTB's, Rancho 9000's, L&P Stage 3 steering system, K&N, Pacesetter headers and 2.5" exhaust, Lock-Right locker, 110A alty and electric fan swap, dual batteries, 700W+ worth of PIAAs, etc.

getbent

I went around a corner today at a high rate of speed and the gauges came back on, but when I shut the engine off and restarted it they didn't work again, does this seem right v\can the regulator just work sometimes?

boogyman

That sounds like a loose connection, the voltage regulator could also have something loose inside it. That could have had the same result.

__________________
'05 Pathfinder LE
'03 Saab 93SS

getbent

I will check again for a bad connection then I will test the regulator, seems pretty easy to do