Constant BEEEEEEEEEP when ignition on NOT MOTOR

W

winterblues

Cadet
Joined
May 31, 2010
Messages
28
long time lurker here so whats up guys finally!! bought a 1990 sea ray 180 with a 135 black max. PO had motor bored out last year .20 and it runs great. but when i turn on the key the alarm goes beeeeeeeeeeeeeep and wont stop. i read on this thread that it could be a bad sensor. i traced the tan wire to the temp sensor in the block. i noticed it had a tan and black wire (black was grounded) on the right side of the block same sensor but only had a black wire and not another tan wire. the motor runs great the pee hole water is hot though. impeller and water pump replacement time? i took out the thermostats and replacing them tomorrow. i traced the alarm horn tan wire going to the ignition thats grounding on the tach or speedometer. i grounded the tan wire to another location and no beep. arent i supposed to get two warning beeps at startup? BTW im bringing the motor to a shop this week. any help will appreciate before i fork over the BIG $$$$

thanks!

ryan
 
j_martin

j_martin

Admiral
Joined
Sep 22, 2006
Messages
7,474
Re: Constant BEEEEEEEEEP when ignition on NOT MOTOR

winterblues said:
long time lurker here so whats up guys finally!! bought a 1990 sea ray 180 with a 135 black max. PO had motor bored out last year .20 and it runs great. but when i turn on the key the alarm goes beeeeeeeeeeeeeep and wont stop. i read on this thread that it could be a bad sensor. i traced the tan wire to the temp sensor in the block. i noticed it had a tan and black wire (black was grounded) on the right side of the block same sensor but only had a black wire and not another tan wire. the motor runs great the pee hole water is hot though. impeller and water pump replacement time? i took out the thermostats and replacing them tomorrow. i traced the alarm horn tan wire going to the ignition thats grounding on the tach or speedometer. i grounded the tan wire to another location and no beep. arent i supposed to get two warning beeps at startup? BTW im bringing the motor to a shop this week. any help will appreciate before i fork over the BIG $$$$

thanks!

ryan
Click to expand...

As you traced it back, it went to a terminal with 3 wires on it. One to the controls, one to the sensor with the black wire, and one to the oil alert. Take them all off. If the alarm still goes off, it's in the harness. If it doesn't, connect back the temp sensor, and the oil alert one at a time. Whichever one sets it off is bad.

The other temp sensor with 2 wires on it is the temp gauge sending unit. It is not connected to the alarm.

hope it helps
John
 
W

winterblues

Cadet
Joined
May 31, 2010
Messages
28
Re: Constant BEEEEEEEEEP when ignition on NOT MOTOR

thanks John, will give it a look at first light. i will keep you posted.
 
S

shankforce

Petty Officer 2nd Class
Joined
Sep 9, 2008
Messages
114
Re: Constant BEEEEEEEEEP when ignition on NOT MOTOR

If the above does not work I would also disconnect the green mercury kill switch take the ground off if the beep stops the switch is no good. Sometimes the tempsending unit is bad or the connection when this happens this is a cheap part to replace on that motor I think $20 and the Kill switch is around $40.
 
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