PROBLEM 15 (Continued)
Boom will not boom down, but will boom up.
Yes
No
Yes No
Use test plug adapter. (See Test 13.) Are +2.3 or more volts
present at pump EDC when control handle is moved forward?
Consult dealer/factory.
Repair or replace wiring or consult dealer/factory.
Replace pump EDC.
Repair or replace pump.
Can boom pump be manually stroked down? (See Test 16.)
Yes No
Does diagnostic DRUM 4 screen (bank 2) approach
-100% pump control with handle moved forward?
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