1992 Mariner 115hp Warning Module Failed

[BJM]

My alarm went off all of a sudden today. The alarm will not stop and its ear splitting.<br /><br />After a lot of poking around and studying my SELOC manual I think the manual is wrong. It claims the temp sensor should be closed until it overheats and then goes open. I studied the wiring and tested the sensor. It definitely is open until 185F when it closes. The wiring setup supports this theory as well. <br /><br />I drained all my oil from the on-engine tank to see if the level sensor is working and it is. No matter what I do the alarm will not shut up.<br /><br />Anyone familiar with these? I think the module is toast. If I'm right, the key on test only checks that the module itself is okay by chirping the alarm. The overheat sensor isn't even a part of the module wiring. How do I check this thing?

 

[BassScratcher]

Re: 1992 Mariner 115hp Warning Module Failed

Is the alarm continuous (beeeeeeeeeep) or intermittent (beep beep beep)? Continuous is the overheat alarm and intermittent is the oil/water sensing alarm.

 

[BJM]

Re: 1992 Mariner 115hp Warning Module Failed

The alarm is continuous but the temp sensor tests out fine (I boiled it in water). The module isn't actually a part of the overheat circuit other than the fact it attaches to a common terminal at one point.

 

[BassScratcher]

Re: 1992 Mariner 115hp Warning Module Failed

Does the alarm sound as soon as you start the engine? If so, it may be a bad warning module. The warning module is part of the overheat circuit in the sense that it triggers the alarm.

 

[ODDD1]

Re: 1992 Mariner 115hp Warning Module Failed

BJM..there is one of 3 things wrong... somewhere the tan wire in the engine/umbilical harness/control is grounding, causing the alarm to sound all the time the key is on...<br />the module is bad....<br />the float magnet combo in the bottom of the oil tank has failed [common] and the module thinks the oil tank is empty, hence screaming at you till you fill it...<br /> Pull the small reed swicth out of the bottom of the oil tank [it is sealed from the oil] and turn the key back on...if it shut up, you need a new oil tank....

 

[BJM]

Re: 1992 Mariner 115hp Warning Module Failed

I was scared to remove the oil switch for fear of a flood of oil. I did however siphon the oil out while I had a meter on the leads. The switch closed just as the oil got near the bottom and opened again as I filled it again.<br /><br />Since I have tested both sensors and the alarm goes off when I unplug the power lead (purple) to the module, I am assuming the module is bad.<br /><br />I ordered one today for $85 Canadian. I hope I am right.<br /><br />Thanks for the suggestions.

 

[ODDD1]

Re: 1992 Mariner 115hp Warning Module Failed

No hope needed on this one ....your ARE right.