Brown wire on power trim switch

[jebeebe]

Hi,
I am rewiring a pontoon and someone ran a brown wire to the middle terminal on the trim switch. I am assuming it is for positive power but they ran it all the way from the motor. Couldn't they have picked it up from under the dash? Or am I missing somthing? The wire is coming from the rectifier. Can anyone clear this up?
Jerry

 

[Laddies]

Re: Brown wire on power trim switch

Power trim systems need more power to operate the solinoids that some of the older harnesses could provide so mercury just ran a seperate power supply back ot the engine or if a factory supplied harness the pump---1 red for hot and a blue for up and a green for down the early sysem did not have a solinoid for down and required extra amperage to operate

 

[jebeebe]

Re: Brown wire on power trim switch

tHANKS lADDIES,
tHIS motor does have an up and down selenoid. It is an 88' merc 60 342140. I have ran a no 10 red wire to a fuse box under the dash to pull power for what ever I need, do I need the wire to the motor? The wire had been tagged on to a red wire on the rectifier with one of those foldover wire connectors and looked non factory.
Jerry

 

[Laddies]

Re: Brown wire on power trim switch

Jerry, as long as the fuse block and wiring will hand the amperage it fine. The factory always ran the powertrim switches from the trim motor solinoid but as long as the wiring is heavy enough and 10 guage is, it really don't matter where its hook as long as it's fused--Bob

 

[jebeebe]

Re: Brown wire on power trim switch

Thanks Bob,
I understand you are a retired merc mecanic and I trust your judgment.
Jerry