1999 johnson 150 guages not working

[phoenixgold2100]

Hi guys I recently bought a 1999 stratos 273 vindicator with a 150 johnson I am pretty sure this boat was a repo and the ignition switch is new. My problem is none of my guages are working. they have power to the lights in them and the fuel guage will move a tiny bit when the ignition is turned on but no tach water pressure trim check engine. engine starts and runs trim works. this is the only thing in the boat that doesn't work. Any help would be great.

 

[Chris1956]

Re: 1999 johnson 150 guages not working

Water pressure gauge is normally mechanical. The rest of the gauges are usually electrical. Mak sure the tach has +12VDC, ground and the grey wire sender from the voltage regulator. Disconect the grey wire at the tach and the VR and see if it is grounded. Also make sure the grey wire is not open.

The fuel gauge sender is usually pink. Ohm it out to ground. Make sure the ground on the fuel tank sender is clean and solid.

 

[boobie]

Re: 1999 johnson 150 guages not working

Make sure you have power on the purple wire coming from the ignition switch to the gauges.

 

[phoenixgold2100]

Re: 1999 johnson 150 guages not working

So the grey wire is the one that controls all the gauges or just the tach? where would the fuel wire be on the tank it's self? I didnt' mention the vro is disconnected and I get a solid alarm when the boat is started. The gauges also have all lights working so I assume there is power and ground to them?

 

[phoenixgold2100]

Re: 1999 johnson 150 guages not working

Oh one more thing... The boat had a new ignition installed is it possible they used the wrong one? I don't have a push to choke ignition so I can't choke the boat at all. are stratos 6 pin harness? maybe the ignition isn't a 6 pin? thanks

 

[boobie]

Re: 1999 johnson 150 guages not working

They could have put in the wrong one or else don't have it wired properly.

 

[Chris1956]

Re: 1999 johnson 150 guages not working

Grey is Tach sender. Purple is power to all gauges. Black is ground to all guages.

That motor should have a push-to-choke ign switch. Sounds like they installed the wrong one. Who knows how it was wired....

 

[phoenixgold2100]

Re: 1999 johnson 150 guages not working

Ok i just got finished checking the ignition it is a push to choke but i got tracing wires and the ones to the system check gauge are just hanging out the back of the gauge they are about 3-4" long would having this gauge not connected make them all not work? common ground maybe. I think they unhooked it as part of the vro disconnect but i really don't know. any idea where these wires are supposed to go?

 

[Chris1956]

Re: 1999 johnson 150 guages not working

Anything is possible. The System Check gauge should have a 8 pin DIP connnector. The wires in the connector are +12VDC, ground, buzzer power, tach sender, overheat sender, no oil sender, low oil sender and check engine sender. Maybe when the OMS pump was bypassed, the PO could not figure out how to silence the no oil and low oil alarms?

A standard OMC wiring harness will also have three ring terminals (purple, black, grey) for connecting a standard (non system check) tachometer.

 

[phoenixgold2100]

Re: 1999 johnson 150 guages not working

I do see the three ring terminals they are not connected. Should they be? The rest of the tan wires have been cut I assume he thought they weren't needed. My questuon now is should i find the tan wires he cut and re join them minus the oil wires. So just connecting the over heat and check wire and buzzer wire to the check gauge. Or could i not just connect purple from ignition gray from tach and a ground to get my tach working. I assume it's not working right now because of the cut check gauge possibly needing that ground for it to work? also my buzzer will just stay on right now until i move the key back a bit while it's running I also have a red/white wire and two blue/ white wires under my dash do these go to the trim gauge? also not working

 

[phoenixgold2100]

Re: 1999 johnson 150 guages not working

thought i'd post some pics. Does anyone know what the red/white and the blue/white wires are for? also in the manual it shows the gray wire coming from the harness so shouldn't the gray from the back of the gauge be going to the engine? or should it just join the gray coming from the engine.

 

[Chris1956]

Re: 1999 johnson 150 guages not working

I would splice all the wires into the System Check harness. Those ring terminals do not look like OEM. I recommend you insulate them and tape them over. Install the 8 pin DIP into the System Check Tacho and see what happens. If you get no oil and low oil alarms, disconnect the connectors at the OMS pump and Oil resevoir respectively.

I think the red/white and blue/white may be from the PTT system. Maybe it is the trim sender? Look on the front of the motor and see if you can find them ad trace to see where they go. I lost my service manual in Huricane Sandy, so I cant get more specific. Maxrules may have a wiring diaghram that is pretty close, and it will be free.

 

[phoenixgold2100]

Re: 1999 johnson 150 guages not working

I have found this online its showing the gray wire going to the engine and spliced to go to the tach so the ring terminal will have to be cut off and joind back to the harness then spliced to the tach also shows that black wire going from the check gauge to the engine but spliced into for the gauge grounds. I can't seem to find all the tan wires that have been cut from the harness I will look to see if they are still on the engine side. If they are pulled completely should i just re wire from the engine? my understanding is that the tan wire is for over heat? thats pretty much the only one i'm concerned about hooking up if i can't find the rest does it come out of the cylinder heads?