TRIM Gaug wiring diagram?

[BAYLINER185]

My trim gauge on my 2755 CIERA cruser is not completly working right.

Its got power and the back light goes on when in start posiiton.

when off the needle goes to full up position like its supposed to. when you trim the drive down the needle starts to go to the down position. The gauge is a left to right configuraton gauge ( like a gas gauge ) NoT up and down like on my new 07 185. So when the drive is tilted down the gauge should rock to the left, when up or ignition switced off the gauge rocks back to the right.

It looks like it starts to rock to the left when trimming down. BUT is doesent go past the full UP positon with the drive at max TRIM UP position ( NOT TRAILER )

I pulled out the gauge to check out and when you reverse polarity between the ground and "S" connections the gauge shoots all the way to the left so I know the gauge does move freely and is not broken. I have to think its the senders not working properly. I had broken senders on my old 19 footer over 10 years ago but I cant remember how the senders are wired.

If I remember correctly one sender is connected to the other in series right? I dont remember.

I know there are only two wires? that go back to the dash board but thats not what I see at the gauge. I have the obviouse GROUND wire thats actually taped into the ground on AUX 12 volt outlet ( cig lighter ) and the obvious +12 volt thats tapped from the light bulb power on the gas gauge. ( it seems to me the trim gauge was added as its not in the main gauge cluster but it could be factory but I dont think it was?

I have 3 wires:

I have 12 volt +
GROUND
and an extra wire wich HAS to be the sender signal

The gauge has:

L = Light
I = +12 volt?
S = Sender
G = Ground

I have the 12v+ and L connected to each other for obvious reasons
( light goes on when key is turned on and power is fed to gauge ) in case its not obvious

Ground is grounded with AUX ground
S must be sender lead and is my 3rd wire

I need to pull the sender(s) and see whats what as they may be shot to hell as the ones on my boat ten years ago basicly crumbled in my hands when I removed them from the drive. If thats the case then they get replaced lol of course.

I also KNOW that they may need to be calibrated if removed. This Im hoping is the problem. Now that I think of it, isnt one sener for UP and the other for DOWN...Yea that seems familure for some reason.

I need a wireing diagram if any one ( DON S) has one or at least some one to confirm that one of the wires connects to the other sender.

Then what happens? Your left with two wires. does one get +12 volts and the other is the gauge signal feed. I cant remeber for SH&*

Help would be good! ALSO I was able to use the existing wires when I did the new senders 10 years ago as I couldnt figure out how they go through the transome. I was able to take the new senders apart and dissconnect the pig tails that come on the senders and do the same with the bad senders. Then just connect the leads to the new senders and wa la the job was done. Calibrate the units and that was that. Id like to use the new leads if I can but how do you run them through the transome without creating a leak?

Any info from this board would be GRRRRRRRRREAT!!!!!!

I know I will figure it out.



OH YEA DUH

ITS A MERCRUSER BRAVO ONE with a 7.4 ( 454 ) motor

 

[Don S]

Re: TRIM Gaug wiring diagram?

What year?

 

[BAYLINER185]

Re: TRIM Gaug wiring diagram?

Don

Sorry thought I covered al my bases....Its a 1993

7.4 Mercruser w/ Bravo one drive

 

[Don S]

Re: TRIM Gaug wiring diagram?

Well, if you Go Here you can download manual #16 for your engine, and #11 for your drive.
Section 4F of manual 16 will have the wiring diagrams of your gauge.
You will probably find the wiing or the trim sender on the outdrive is causing your problem. Book 11 will explain how to replace them.

 

[BAYLINER185]

Re: TRIM Gaug wiring diagram?

DON thanks a million

I did however figure it out. It was just the sender not being calibrated in the correct posiiton. Its working pretty good except the last little bit of full down trimming shows full trim down on the gauge just a little before the drive is actually all the way down.

I think the sender is a little bit wore out and causing that but the most important positions I need are showing fine each and every time on the gauge.

I see it says right on the units one is the sender for the gauge and the other is the limit switch.

It all came back ot me when I was screwign with it.

I am going to download the info you poste as I KNOW it will coem in habdy in the future.
Again Thanks