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Alpha One remote controls

Mines a bit different. I do have the 3 wire plug, but I also have a solenoid on the front of the engine, that the limit wires run to. I also found there was a blue/white wire connected to a purple wire. I disconnected that, and the pump doesn't run on the up side of the rocker switch. I'm going to try and find a wiring diagram, and try and sort this mess out.
 
the solenoid in front of engine is the Starter slave solenoid.

The trim pump system is all together in one "module" With the exception of the control handle and switches.

Below is the schematic. Note: The connection at the trim limit switch has three wires, two together and one single. This is describe by me in an earlier post as the "" After connector there should be a two wire bundle in a small holder."" this should be close to pump module. There is a good chance that the trim limit stopped working and they jumped the wires at this location. Very common to do, until trim limit switch is replaced.



Power trim schematic.jpg
 
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Thanks for the wiring diagram. I found the same one, but yours is a lot clearer. I have a complete, almost new Mercury outboard trim pump here, I'm wondering if I can substitute it for the existing obviously mis-wired one. The only difference is that it won't have the 'trailer' function.
 
Not understanding why you wont have that function.

If its wired as schematic then trailer should work.

What may not work is when trimming up from all the way down, It may not stop due to a bad limit switch and possibly the wires jumpered that allow the trim button to raise drive all the way up so you will need to learn just how high you can trim up before cavitation occurs when running at high speeds.
 
Clarifying Trim/Tilt/Trailer

Trim down will lower drive all the way down.

Trim Up will raise drive several inches as measured on the trim ram extenting and is typically the usable amount of trim when on plane for max performance/ smoother ride as this allows bow to raise up.

Trailer or as some call it Tilt. Is a overide of the trim limit and allows drive to be raised up all the way or to something higher than limit allows for slow movement in shallow water and/or to raise drive all the way up when trailering boat.
 
That's not how mine is presently working. The square 'trailer' button lowers the drive. Both the 'up' and 'down' positions of the toggle switch raises the drive. I have 4 wires coming from the controls, red (power), blue (up) green (down). The forth wire is purple. It was tied into the blue wire, by some DIYer. I disconnected it, and only the down toggle position works, NOT the up position.
 
Purple is typically instrument/dash power from the key on position. The trim switches (both rocker & squater trailer button) should have power at all times, both key on or key off.

I assume you are seeing the above stated wires at the pump and HAVE NOT disassembled the throttle handle to look there.

So as the previous DIYer has so kindly wired things, you must essentially move your hand from the top of the throttle down the handle stalk to trim down. Not such a safe or convenient situation.
 
OK, I pulled the handle apart today. Some owner at one time had messed up the wires going to the switches. He had the purple wire feeding to the blue wire, which gave me up trim on both the up and down trim buttons, Now I need to order both the trim limit switch and trim sender.
 
18Warrior said:
OK, I pulled the handle apart today. Some owner at one time had messed up the wires going to the switches. He had the purple wire feeding to the blue wire, which gave me up trim on both the up and down trim buttons, Now I need to order both the trim limit switch and trim sender.
Click to expand...
Were the switch wires cut very short? If they left enough to reach, you can replace the terminals and wire them correctly. If not, keep us posted, to see a few tricks to making the wiring easier- it can be a PITA WRT reinstalling the bolt for the stainless plate that keeps them in place on the transom.
 
Do not purchase aftermarket limit and trim sender.

Buy only Mercruiser/Quicksilver brand.

If you see it "Replaces or works with" that product will be after market.

This site sells Mercruiser parts.

The senders are that same on Alpha gen 1 and Gen 2.

On Gen 1 the plate that holds the two wired where they pasa thru transom assembly has two 7/16 hex bolts. A real pain in the A$$ to get top bolt out and harder to get back in.
The Gen 2 part is thicker and only uses the lower bolt.
If i have time i will post links to parts. On my phone now.
 
kghost said:
Do not purchase aftermarket limit and trim sender.

Buy only Mercruiser/Quicksilver brand.

If you see it "Replaces or works with" that product will be after market.

This site sells Mercruiser parts.

The senders are that same on Alpha gen 1 and Gen 2.

On Gen 1 the plate that holds the two wired where they pasa thru transom assembly has two 7/16 hex bolts. A real pain in the A$$ to get top bolt out and harder to get back in.
The Gen 2 part is thicker and only uses the lower bolt.
If i have time i will post links to parts. On my phone now.
Click to expand...
PITA, but if the bolts for the gimbal are removed and the boat is positioned so the drive can only be lowered about an inch and restrained so it can't stress anything, it's not as bad- easier if the drive is removed. I ground a socket very short, so the shoulder of the bolt and edge are at the same plane. I use 1/4" drive for those and a wobble extension to make the socket fit the angle. First time I did one was not a good day. I didn't have the tool for the gimbal bolts with me at the time, so I used a grabby tool to hold the two bolts for the plate and get them started. It still sucked.

I definitely agree with using OEM parts- I have seen some generic failures and it's just not worth the slightly lower cost to be forced to replace them when they fail.
 
I've ordered a set of aftermarket senders. I'm not worried about trying to run the new wires though the transom, I'll cut the wires then use good heat shrink connectors to join them. Just for reference, the aftermarket set is 1/4 the price of Mercury parts. I'm a bit confused by the tilt limiter wires, they run to a solenoid at the front of the motor, and I don't see any connection between it and the trim motor?
 
jimn said:
Were the switch wires cut very short? If they left enough to reach, you can replace the terminals and wire them correctly. If not, keep us posted, to see a few tricks to making the wiring easier- it can be a PITA WRT reinstalling the bolt for the stainless plate that keeps them in place on the transom.
Click to expand...
He didn't cut the switch wires in the handle, he just had the pins going into the wrong terminals.
 
jimn said:
You had posted that the wires were cut in the engine bay- I was asking about those wires, not at the handle.
Click to expand...
Sorry. He cut the trim wires long enough that they run to the front of the engine. I can't find any buried in the side of the boat with all the other wires. I'll just splice into them using heat shrink tubing.
 
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