I removed my oil pump ..... I disconnected some wires goin to it and now I dont get a sound ( beep beep ) when i turn my key on .....Id like to know if my over heat alarm ( water Temp ) is still working .....Whats an easy way to check it ? Thanks for looking
Hot horn sensor is in the starboard head. Just follow the wires coming from it to where they terminate on a terminal block...should be above the switchboxes. Then, with the key switch on, ground a wire from that terminal point connection to the block. If your horn is working, it will sound off.
The wire color you're looking for (that signals the warning horn) is: TAN w/BLUE STRIPE.
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
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ok , I found the termanal block with the tan / blue wire ...... I took a jumper wire with the key on and went from the termanal block to the engine block and no sound ..... What can i check next ?
Locate the warning horn under under the dash.
Test as follows:
PURPLE wire should have 12V+ power with key "on".
Tan w/blue-stripe wire is the same "signal" wire you grounded at the engine. If a ground is provided to this wire (with key on), the horn should sound.
If you have power, and provide ground to Tan w/Blue stripe wire at the horn- and it still does NOT sound: Replace warning horn (it's faulty).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
I think I found the horn taped up under the dash .... I didnt get time to check it yet .... I was wondering since everything was working till I disconnected the oil pump .... ( the beep when i turnned the key ) wouldnt it make sense this is related to the removal of the pump ( oil warning ) horn .... I mean isnt this the same horn ? I also checked for voltage at the terminal black and hav 12 volts on both connections ..... Im thinkin I should have jumpered the oil warning wires when i disconnent it ....
Disconnecting the oil injection and the various "boxes" associated with it shouldn't have anything to do with the hot horn working or not.
If the oil warning module had TWO Tan w/blue stripe wires- then yes, you likely will have to jumper those two wires (some did, some did not- sorry, I don't have a diagram in front of me today, as I'm out of town).
Dual Mercury Master Technician- for Mercury Outboards, Mercruiser and Mercury Racing at European Marine in Greenville, SC.
Still consider myself a "Marine Apprentice" after 48 years (learn something new every day).
Mercury Parts, Mercury Outboards, Smartcraft & Accessories, Injector Service, TDR Reeds- BBC Sponsor
Thank you so much .....That is what my gut was tellin me .... I had a feeling I messed it up from the oil pump / pre mix switch .... Im glad i use a temp gauge to keep an eye on the engine temp ..... I will post back soon as i look at it this weekend .....
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