Samurai 2WD L4-1324cc 1.3L SOHC 5 Carb 8V (1987)
Fuel Temperature Sensor: Technical Service Bulletins
Fuel & Temperature Gauges - Service Advice
TSB No. TS 2-01 02159(R)
Section Title: Body Electrical
Division: Automotive
Category: Technical
SUBJECT:
Fuel and Temperature Meter Replacement
MODEL: Samurai
YEAR: All
Care must be taken to avoid damaging the fuel meter when installing an air conditioner or working in the instrument cluster area.
The fuel and temperature meters operate on a seven volt circuit that is maintained by a voltage regulator which is built into the fuel meter. If the seven
volt power lead or any of its terminals are accidentally grounded, the thin wire in the fuel meter that comes from the regulator to the seven volt post will
overload and sever. When this occurs, the seven volt supply is cut and the fuel and temperature meter becomes inoperative.
In most cases, only the fuel meter is damaged and the temperature meter is still in working order. The fuel and temperature meter test procedures in
section 21, pages 11 and 12 of the service manual are valid only if the fuel meter seven volt circuit is undamaged.
There are several known reasons for the fuel meter seven volt wire melting:
1.
Failure to disconnect the battery when installing an air conditioning unit and seven volt power lead is accidentally grounded.
2.
Pinching the seven volt A/C harness wire in the radio mounting bracket.
3.
Grounding a seven volt meter post when reinstalling the cluster/circuit board assembly.
A problem with the fuel or temperature meter after delivery of the vehicle should not automatically be considered a warranty matter.
CAUTION:
ALWAYS REMOVE THE NEGATIVE BATTERY CABLE WHEN WORKING ON OR AROUND ELECTRICAL COMPONENTS.
