1987 Honda Fourtrax TRX 250X Service Manual, Page 220Get this manual
ELECTRICAL SYSTEM INSPECTION Disconnect the AC regu lator coupler and check if for loose contect or corroded terminal
Measure the resistance between coupler terminals of the wire harness side
STANDARD: .11.0 120C68 F)
If the resistance is normal and the specific voltage is out of the specification, replace the AC regulator, If the resistance is out of order, check the wire harness for short or open circuits or the coupler or connectors for loose or
poorly contant