Volvo trim gauge problem

[Bjames]

I have a 1994 Montery with twin 4.3 Volvo DP. It has standard analog trim gauges but use to have these small black boxes with led lights and 2 relays. It has since all been disconnected and is now wired direct from gauges to trim sensors. The problem is that it only uses 2 of the 3 wires for the sensor. The gauges sort of work, when the legs are all the way down the gauge shows down but when you raise them the gauge comes up but tops out by the time the leg reaches @ 15 or 20 degrees. I have determined that the gauges work on a 0 - 200 ohm scale but the senders a actually potentometers not reostats. Does anyone know if you can buy different sensors that just use 2 wires? the ones I have are part no. 828726. I talked to a local electronics guy who gave me an assortment of resistors to try putting in line to the sender but then I can't get down to 0 ohms so the gauges never go all the way down. Would really appreciate any help at all.. I'am out of idea's
Thanks Brian

 

[Don S]

Re: Volvo trim gauge problem

What model engine and drive do you have? Is the engine red or gray? Trust me, the color tells me a lot.

 

[Bjames]

Re: Volvo trim gauge problem

What model engine and drive do you have? Is the engine red or gray? Trust me, the color tells me a lot.

model 434. red

 

[Don S]

Re: Volvo trim gauge problem

Ahh, 93 engine and drive. Exactly why I ask for numbers and not year.

Let me look at some things, and I will post back in a while.

 

[Bjames]

Re: Volvo trim gauge problem

Ahh, 93 engine and drive. Exactly why I ask for numbers and not year.

Let me look at some things, and I will post back in a while.

Thanks. I've been trying to fix these for more than a year now!

 

[Don S]

Re: Volvo trim gauge problem

Ok, found the info, unfortunately it wasn't for your type of drive, it was for the SX. Sorry about that.

Have never seen a regular analog gauge used with one of those potentiometers. Not saying it isn't possible, just never seen one. They should also have a 300 ohm range of travel, not 200.
Maybe these two files will help, if not, sorry. Best I could do. Might be time to learn to trim by feel, tach and speed, instead of a trim gauge. It's a heck of a lot more accurate.

View attachment DP-E 75.pdf View attachment Testing the Potentiometer.pdf