Faulty Trim Motor Switch

braceyourself · 02-10-2012, 07:54 AM

I have a 2000 Johnson 150. I can trim the motor both up and down with the switch on the engine. With the switch on the throttle I can only trim the engine down; I cannot trim the engine up. I'm guessing that the problem is a faulty connection in the throttle? Does this sound right? Thanks.

TheCaptKen · 02-10-2012, 08:01 AM

Yep!

braceyourself · 02-10-2012, 08:22 AM

Thanks Capt Ken.

slayerextreme · 02-10-2012, 08:32 AM

check the associated connector that is not in the throttle handle..had same issue, ended up being a pig-tail type connector that came off the throttle assembly that connected into the electrical harness that went back to the motor....mine was a square connector that had just worked loose....if both the up and down quit from the throttle at the same time, i wouldn't think that the switch in the handle is the issue....

braceyourself · 02-10-2012, 08:46 AM

Where was your associated connector located exactly? thanks.

slayerextreme · 02-10-2012, 09:04 AM

mine was about 2 foot from where the throttle was mounted in the console...if you can locate where the wires actually come off of the throttle assembly....it should lead you to a connector that connects the throttle into the motors wiring harness that goes back to the engine....sometimes the connector is bundled and tie wrapped into the rest of the boats wiiring and hidden under a console.....the "switch" in the throttle is nothing more than a set of contacts that is "extended" from the same wiring that is used to actuate the up and down functions of the switch located on the motor.....the engines wiring harness(including the trim control) is ran from the engine to the helm, where the throttle assembly is normally connected via "connectors"......again, locate the wires leaving the throttle...it should lead you to a connector...one located, verify connectivity...and you can always use this connector to test the "switch" on the throttle by using an ohm meter

The Maintenance Shoppe · 02-10-2012, 10:23 AM

Look for the blue, red, and green wire coming out of your shift control box.

slayerextreme · 02-22-2012, 09:42 AM

What was the outcome of this issue???

birdsnest · 02-22-2012, 12:14 PM

I'm not sure how the Johnson works but I used to have the same problem periodically with a Yamaha 115. I'd take the switch apart and clean the contacts with emory cloth and it would be good for another season or two. Be careful there is a small spring in there that would launch itself when I wasn't prepared for it.

02-10-2012, 07:54 AM	#1
braceyourself Junior Member Cigar Minnow Join Date: Oct 2007 Posts: 17	Faulty Trim Motor Switch I have a 2000 Johnson 150. I can trim the motor both up and down with the switch on the engine. With the switch on the throttle I can only trim the engine down; I cannot trim the engine up. I'm guessing that the problem is a faulty connection in the throttle? Does this sound right? Thanks.

02-10-2012, 08:01 AM	#2
TheCaptKen Senior Member Trigger Join Date: Mar 2011 Posts: 295	Yep! __________________ NelsonMarineService.com

02-10-2012, 10:23 AM	#7
The Maintenance Shoppe Senior Member Snapper Join Date: Nov 2007 Posts: 582	Look for the blue, red, and green wire coming out of your shift control box. __________________ *The Maintenance Shoppe* Full service boat, pwc, and trailer repair 4048 Creighton Rd Pensacola, FL. 850-221-6789 www.themaintenanceshoppe.com

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02-10-2012, 08:22 AM	#3
braceyourself Junior Member Cigar Minnow Join Date: Oct 2007 Posts: 17	Thanks Capt Ken.

02-10-2012, 08:32 AM	#4
slayerextreme Red Snappa Slappa Ruby Red Lip Join Date: Jan 2012 Location: Griffin Ga Posts: 91	check the associated connector that is not in the throttle handle..had same issue, ended up being a pig-tail type connector that came off the throttle assembly that connected into the electrical harness that went back to the motor....mine was a square connector that had just worked loose....if both the up and down quit from the throttle at the same time, i wouldn't think that the switch in the handle is the issue....

02-10-2012, 08:46 AM	#5
braceyourself Junior Member Cigar Minnow Join Date: Oct 2007 Posts: 17	Where was your associated connector located exactly? thanks.

02-10-2012, 09:04 AM	#6
slayerextreme Red Snappa Slappa Ruby Red Lip Join Date: Jan 2012 Location: Griffin Ga Posts: 91	mine was about 2 foot from where the throttle was mounted in the console...if you can locate where the wires actually come off of the throttle assembly....it should lead you to a connector that connects the throttle into the motors wiring harness that goes back to the engine....sometimes the connector is bundled and tie wrapped into the rest of the boats wiiring and hidden under a console.....the "switch" in the throttle is nothing more than a set of contacts that is "extended" from the same wiring that is used to actuate the up and down functions of the switch located on the motor.....the engines wiring harness(including the trim control) is ran from the engine to the helm, where the throttle assembly is normally connected via "connectors"......again, locate the wires leaving the throttle...it should lead you to a connector...one located, verify connectivity...and you can always use this connector to test the "switch" on the throttle by using an ohm meter

02-22-2012, 09:42 AM	#8
slayerextreme Red Snappa Slappa Ruby Red Lip Join Date: Jan 2012 Location: Griffin Ga Posts: 91	What was the outcome of this issue???

02-22-2012, 12:14 PM	#9
birdsnest Senior Member Trigger Join Date: Oct 2007 Posts: 333	I'm not sure how the Johnson works but I used to have the same problem periodically with a Yamaha 115. I'd take the switch apart and clean the contacts with emory cloth and it would be good for another season or two. Be careful there is a small spring in there that would launch itself when I wasn't prepared for it.

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