SERVICE MANUAL NUMBER 24
TROUBLESHOOTING
NOTE: Perform the following tests with engine(s) not running.
Compressor Will Not Run - Testing Mode Switch
Cause
Special Information
Fuse is blown or wiring is faulty
PUR wire does not have battery voltage
BRN wire does not have battery voltage
when mode switch is held in THRU-TRAN- Switch is faulty
SOM position
GRY wire does not have battery voltage
when mode switch is held in THRU-PROP Switch is faulty
position.
Compressor Will Not Run - Testing Air Pump
Cause
Special Information
NOTE: Ensure that BLK wire, in terminal block, is grounded to engine.
BRN wire, in terminal block, does not have Wiring is faulty.
battery voltage when mode switch is held
in THRU-TRANSOM position.
If voltage is present, air pump is faulty.
Air pump Runs - System Inoperative
With air pump running, check hoses, fittings, solenoid, and relief valve for air leakage.
Replace parts as needed.
System operates but goes THRU-PROP after air pump stops running
1.
2.
3.
Ensure that air pressure is not leaking past solenoid. If so, replace.
Ensure that air pressure is not leaking back through air pump. If so, replace check valve.
Ensure that air pressure is not leaking at air cylinder assemblies. If so, replace faulty
ones.
System stays in THRU-TRANSOM mode, will not go back to THRU-PROP mode
GRY wire, in terminal block, must have battery voltage when mode switch is held in THRU-
PROP position. If not, wiring is faulty. If voltage is present, solenoid is faulty.
Index
90-861327--1
OCTOBER 1999
Page 1C-33
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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