Regal 42SC Owner's Manual page 320

INSTRUMENT DIAGNOSTIC CHART
PROBLEM
No reading on gauge or gauge reads
wrong
Gauge reads erratic
POSSIBLE CAUSE
Faulty gauge
Wiring to gauge faulty
Faulty sender
Loose ground or hot wire
8
Chapter 9
POSSIBLE FIX
Replace gauge
Inspect/repair wiring
Replace sender
Repair/replace wire and/or connec-
tion