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STEP 2
Before proceeding with the tests below, verify that each orange power wire is connected to a live positive power source and that the
fuses* are not blown. Make sure that each black wire has a good connection to ground.** After this is complete, conduct the tests below.
If the trim tab(s) is still operational after conducting the tests in Step 1, then either the Y-Harness or EIC Relay Module is at fault.
Perform the test below by removing the EIC Dual Pump Cable (Y-Harness) from the EIC Relay Module. Using a hot lead, directly
power the end of the Y-Harness just removed from the EIC Relay Module (four wires in the plug) as shown below:
Touch positive to Red and Blue Simultaneously
Touch positive to Red and Yellow Simultaneously
Touch positive to Green and Blue Simultaneously
Touch positive to Green and Yellow Simultaneously
Touch positive to Red, Green and Blue Simultaneously
Touch positive to Red, Green, and Yellow Simultaneously
If the trim tab(s) is still not operational when powered through the Y-Harness, then the Y-Harness is faulty.
If both trim tabs operate as they should after conducting the above test, then the EIC Relay Module may be faulty.
Conduct the following test by directly powering the shorter, unused cable on the EIC Relay Module:
Touch positive to Red and Blue Simultaneously
Touch positive to Red and Yellow Simultaneously
Touch positive to Green and Blue Simultaneously
Touch positive to Green and Yellow Simultaneously
Touch positive to Red, Green and Blue Simultaneously
Touch positive to Red, Green, and Yellow Simultaneously
If the trim tab(s) is still not operational when powered through the EIC Relay Module, then the EIC Relay Module is faulty.
If both trim tabs operate properly when the above test is conducted, then either the EIC Display or the EIC Wire Harness is at fault.
Ensure that both ends of the EIC Wire Harness are seated firmly in the plugs, and that the EIC Display's orange wire has proper voltage.
* This system could contain up to five (5) fuses — three (3) 1.5 amp, with two (2) 10 amp (24V) or two (2) 20 amp (12V). The boat builder could
have replaced these fuses with breakers, or used breakers and inline fuses.
** There are five (5) ground (black wires) — two (2) DAHPUs, two (2) Dual Acting Relay Modules and one (1) EIC Relay Module.
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Operation
Operation
Reaction
Port trim tab down
Port trim tab up
Starboard trim tab down
Starboard trim tab up
Both trim tabs down
Both trim tabs up
Reaction
Port trim tab down
Port trim tab up
Starboard trim tab down
Starboard trim tab up
Both trim tabs down
Both trim tabs up
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