"99 90hp E90FPLEEC motor has no power past solenoid. No trim but relays buzz no start

[toddschubert]

"99 90hp E90FPLEEC motor has no power past solenoid. No trim but relays buzz no start

A friend brought me his 90 Rude that has been sitting for a year. Attempting to get trim working I'm finding nothing works. On trim the relays buzz a little pressing up and down like not enough voltage but battery is tested good at 12.7 V and strong amps. I have 12V at solenoid but don't know where to look after that.
Can anybody give me a suggestion as to where to look for a problem on this motor?
I'm pretty good on the older models in this size range but not very familiar with this injected 90hp.

 

[jakedaawg]

Have you tried cleaning terminals with a wire brush and tightening with a wrench. When you mention strong amps I am assumeing you load tested the Battery.

 

[toddschubert]

Yes, All connectors are clean and I even went so far as to put a known good 12v power supply at the main solenoid and ground.
Just replaced solenoid and still same problem. No start and trim just clicks or buzzes. I also tried exchanging trim relays around but still same problem.

 

[toddschubert]

on the trim I'm only getting 8.5V on the connector going to the trim tilt motor. I tried putting 12V on that connector to motor but nothing happens

 

[jakedaawg]

I would guess that you have a bad wire. Either heavily corroded or almost completely broken. Starting at battery I would isolate the wires and ohm check while bending and twisting. You will probably find one somewhere that has high resistance.

 

[toddschubert]

I'm thinking computer or whatever it's called on these models. Ecm maybe. Everything checks out but that. Don,t know how to check

 

[daselbee]

Ummmm...no. Not the EMM. Look for a bad battery cable. High internal resistance on either the positive or the negative cable. Corrosion on the bolts that attach to block (negative).

 

[daselbee]

I just went and looked up the model. You do have a PDP (power distribution panel) and there have been known broken solder joints on the V6 PDPs.
Possibly there is a problem there.

 

[toddschubert]

Thanks for all the feedback!

Let me get on my soapbox for a second though.
So many times I have answered questions by readers who bless their heart, are trying to help, only to have my answer to their question be ignored.
Case in point here in this post. I said the wires and terminals were all good and clean! I realize you don't know my level of expertise but you have to assume I know what I'm talking about and proceed with troubleshooting based on my answer.

The problem ended up being a bad trim motor. Also solenoid was automotive type and not grounded to base so it had to be grounded by wire. That was my bad. They looked identical