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Ask Noel Schembri Your Own Question
Noel Schembri
Noel Schembri, Marine Technician
Category: Boat
Satisfied Customers: 1944
Experience:  Advanced technical diploma
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Sure. We have a bayliner 219...2004 that currently is running

Customer Question

Sure. We have a bayliner 219...2004 that currently is running fine but the tach, temp, and tilt gauges aren't functioning. Unable to locate the fuse ... Can you assist?
Submitted: 1 year ago.
Category: Boat
Expert:  Noel Schembri replied 1 year ago.
Hello my name is ***** ***** I will assist you. Check under the dash you should have an inline fuse with the harness giving power to the gages. Most probably that is blown. Replace it and you should go.
Noel
Customer: replied 1 year ago.
Can't find the inline fuse.
Expert:  Noel Schembri replied 1 year ago.
Can you advise what engine you have?
Customer: replied 1 year ago.
Mercruiser not sure of size. The boat is the Olympic edition. There is no fuse block under the helm. There is a 25 amp & 10 amp inline by the battery. Will be pulling the gauges out to trace the wiring later.
Expert:  Noel Schembri replied 1 year ago.
Ok the fuse should be in line with the wiring on the gauges on the purple wire. The purple wire should go from the ignition switch to the gauges +Ve terminal Noel
Customer: replied 1 year ago.
Thanks there is a hanging purple wire. Will be a few hours before I can check it. The boat is at a different location
Expert:  Noel Schembri replied 1 year ago.
ok it can be that the purple wire got disconnected. Check for an empty eylet on one of the gauges as the purple is bridging from all the gauges so if you connect it to any purple one you have power. Noel
Expert:  Noel Schembri replied 1 year ago.
Did you check on the above? Do you require further assistance ? If you managed to solve the problem kindly rate my service.
Thanks,
Noel
Customer: replied 1 year ago.
Hi Noel. Today I was able to go over to the boat and check it out. We validated the following:
1. We found the fuse block. We had to take off the back of the seat on the deck...in front of the helm.
2. We found one blown fuse....it was a 10 amp fuse that goes to the secondary stereo accessory (there is nothing hooked to it at this time.) We replaced this fuse.
3. The disconnected purple wire was going to the horn...and has been reconnected. The horn functions properly.
4. We validated that there is 12 volt dc going to all of the gauges.
5. The fuel and volt meters are working fine.
6. We checked the grounding going to the gauges...and they are grounded to the grounding block above the motor.
7. Oil, trim, tach, temp gauges are NOT working.
8. We traced the sending wires back thru the main engine wiring harness...and back to the ICM module.
7. At this time, we are concerned that a portion of the ICM module is not functioning completely. The engine runs fine...but (4) gauges do not function. We took the boat out on the water Saturday and ran for a good 3 hours...and the (4) gauges did not function the entire time.
8. Do you know any way to troubleshoot the ICM function for the gauges?....or the connection block on the ICM?
9. Do you know of anything else we should look at??We look forward to your response. Thanks for your assistance.Regards,
Expert:  Noel Schembri replied 1 year ago.
To troubleshoot the engine, you need to connect it to a diagnostic tool and like that you can see that the gauges signal are functioning from the ECU. So you are confirming that there is 12 V going to the VSS and the ground? |There is another 12 v to light up the gauges with the navigation lights. Try making a bridge between these two 12 volts and switch on the lights and see if they are working like that.
Noel
Customer: replied 1 year ago.
Hi Noel,Yes, there appears to be 12 v going to the VSS (ICM) and the ground. I measured the voltage to the back of all of the gauges (11.8 v).I made a bridge between the (2) 12-V cables by connecting purple wire +12V of all the gauges to the +12V for the lights. (the cable for the VSS and the cable for the lights). The lights will work with the bridge...the gauges will not.Any suggestions? Please let me know.Thanks for your help.
Expert:  Noel Schembri replied 1 year ago.
so if power is coming to the gauges then the only thing left is the signal, and that comes from the ECM. As i explained earlier to check the output of the ECM you would need to connect it to a diagnostic tool. At this stage i don;t think there are many more options. to go through unless all gauges have had an over voltage or short and have been damaged, but i doubt that. Noel
Expert:  Noel Schembri replied 1 year ago.
Did you manage to get the engine diagnosed to check if the gouges are working?
Noel
Customer: replied 1 year ago.
we took it into the shop today. they said they will need until Thursday to check it out.
Expert:  Noel Schembri replied 1 year ago.
Ok keep me updated and kindly rate my service. Thanks, Noel

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