1992 Mazda B2200 Gas Guage error

SCOTTY41B

MEMBER
1992 MAZDA B2200
4 CYL
2WD
MANUAL
105,000 MILES

When I fill the tank full, the gauge only shows three quarters of a tank. Could this be a constant voltage regulator, and how do I locate it?

Saturday, September 4th, 2010 AT 9:50 AM

1 Reply

BLUELIGHTNIN6

MECHANIC
16,542 POSTS

Probably faulty sending unit in tank. Will need to disconnect sending unit connector and test with ohmmeter. If tank is half full than ohm should be 29 - 37. Almost empty it should be 103-117. Almost full should be 1-5. If any reading is wrong than sending unit needs replaced.