How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask AutoDoc Your Own Question
AutoDoc, Technician
Category: Classic Car
Satisfied Customers: 394
Experience:  ASE Certified Master Tech with Advanced Level (L1) - 20 Years Exp. with multiple makes of vehicle
Type Your Classic Car Question Here...
AutoDoc is online now
A new question is answered every 9 seconds

A 0-30 Ohm gas gauge and a 0-90 Ohm fuel sending unit..12 volt

This answer was rated:

How do you make a 0-30 Ohm gas gauge and a 0-90 Ohm fuel sending unit on a 12 volt automotive system compatible?


The easiest way to get a close reading is by soldering a 47 OHM (1 watt >=) resistor between the fuel gauge output terminal of the sender and the metal base of the sender - it will sweep pretty normally; it will read 'EMPTY' before it really is, but this is a good thing because you will always have reserve fuel in the tank - Thanks, Dave

AutoDoc and other Classic Car Specialists are ready to help you