constant beeping 1999 XR6

[venture]

just bought boat yesterday when up lake about 2 miles and it started beeping boat has not been on lake this year finally got boat back in trolling started it up at the dock it started beeping as soon as I started it up came home and check the oil in the upper tank and it was full also took ohm's meter and check the screw on cap and it was OK. it only has a water pressure guage it was working and it does not have a temp guage the brown wire is disconnected

 

[JUSTINTIME]

Re: constant beeping 1999 XR6

sounds like a bad sensor
i would buy a manual and test

 

[j_martin]

Re: constant beeping 1999 XR6

If the gear sheared on the oil pump, it will go beep, beep, beep. Don't under any circumstances run it like that without adding oil to the main fuel tank.

If it's a steady horn on, it's either a hot engine or a short in the wiring.

hope it helps
John

 

[planoracer]

Re: constant beeping 1999 XR6

sounds like the problem a friend of mine has with a 1991 200EFI. It turned out to be the drive gear inside the power head was sheared off. he is replacing with an electronic oil pumpe drive set up.

sounds like a bad sensor
i would buy a manual and test

 

[Texasmark]

Re: constant beeping 1999 XR6

The V Mercs, at least the '95, have 2 stats in the top of the water jackets. One has a tan wire and the other a tan/blue. They both go to a junction block on the side of the engine and then one wire goes to the warning module.

The sensors should be an open circuit unless the water jacket temp exceeds 195F. The alarm for overtemp is constant rather than intermittent which is used to ID oil problems.

Son had one of them develop resistance (failed) and caused an alarm as you mentioned.

Mark

 

[j_martin]

Re: constant beeping 1999 XR6

The V Mercs, at least the '95, have 2 stats in the top of the water jackets. One has a tan wire and the other a tan/blue. They both go to a junction block on the side of the engine and then one wire goes to the warning module.

The sensors should be an open circuit unless the water jacket temp exceeds 195F. The alarm for overtemp is constant rather than intermittent which is used to ID oil problems.

Son had one of them develop resistance (failed) and caused an alarm as you mentioned.

Mark

The wire from the temperature gauge sensor is tan. It goes into the harness, and may or may not be hooked up at the console. It is a rheostat, so it will always show resistance to ground.

The wire from the overtemp switch, which will be in about the same position in the other head is black.

The wire from the lubalert to the alarm is tan/blue. It will be connected under the same screw as the black wire mentioned above.

If the tan, and tan/blue wires were hooked together, it was wired wrong.

RTFM

hope it helps
John

 

[Texasmark]

Re: constant beeping 1999 XR6

Yeah, I noticed that this morning. I should have said that the wires went to the over temp sensors. Sorry for the error......course there is no wire attached to the stats/cover, etc. anyway.

I don't have the engine in front of me and it has been 6 months since we solved the problem and I have forgotten some of it, and it was a one time occurrence, but:

He had a dim solid alarm and dim solid warning on the dash lamp anytime the key was turned on.

There are two sensors embedded in the water jackets and each has a different colored wire.......as I remember, now that you are questioning me. Grin I guess I could drive over to the son's house and look at his engine to refresh my memory.

It doesn't make sense to me for an OEM to purchase two distinctly different parts to perform the same function. So that gives merit to the same part number being used in both sides which would yield a tan wire for both.

So it doesn't make sense to have one sensor with tan and the other with tan /blu wires. I am aware of the extra tan wire in the harness that is associated with the control box wiring. Don't remember an extra tan wire loose in the engine compartment. But that's not to say there isn't one.

We untied the wraps on the harness and followed the wires to the terminal block. Removing the wires, and ohming to ground, one had like 185 ohms of resistance (engine cold) and the other was open as it was supposed to be. With the 185 wire disconnected the horn and lamp quit emitting. A new one solved the problem.

On the sensor, this is an on-off type thing that has a trip point (195F) when you exceed it's rated temp. You wouldn't be using a rheostat for that and in my service manual for another engine it is referred to as a switch; which it is.

Maybe you are referring to a different function as you used the words "temperature gauge sensor". I can understand a sending unit for a gauge which is an analog instrument displaying a range of temperatures to be driven by a rheostat, varying in resistance and varying the current thru the meter movement as it varies.

Besides, we replaced the part and the problem disappeared as did the resistance reading.

HTH

Mark

 

[j_martin]

Re: constant beeping 1999 XR6

Yeah, I noticed that this morning. I should have said that the wires went to the over temp sensors. Sorry for the error......course there is no wire attached to the stats/cover, etc. anyway.

I don't have the engine in front of me and it has been 6 months since we solved the problem and I have forgotten some of it, and it was a one time occurrence, but:

He had a dim solid alarm and dim solid warning on the dash lamp anytime the key was turned on.

There are two sensors embedded in the water jackets and each has a different colored wire.......as I remember, now that you are questioning me. Grin I guess I could drive over to the son's house and look at his engine to refresh my memory.

It doesn't make sense to me for an OEM to purchase two distinctly different parts to perform the same function. So that gives merit to the same part number being used in both sides which would yield a tan wire for both.

So it doesn't make sense to have one sensor with tan and the other with tan /blu wires. I am aware of the extra tan wire in the harness that is associated with the control box wiring. Don't remember an extra tan wire loose in the engine compartment. But that's not to say there isn't one.

We untied the wraps on the harness and followed the wires to the terminal block. Removing the wires, and ohming to ground, one had like 185 ohms of resistance (engine cold) and the other was open as it was supposed to be. With the 185 wire disconnected the horn and lamp quit emitting. A new one solved the problem.

On the sensor, this is an on-off type thing that has a trip point (195F) when you exceed it's rated temp. You wouldn't be using a rheostat for that and in my service manual for another engine it is referred to as a switch; which it is.

Maybe you are referring to a different function as you used the words "temperature gauge sensor". I can understand a sending unit for a gauge which is an analog instrument displaying a range of temperatures to be driven by a rheostat, varying in resistance and varying the current thru the meter movement as it varies.

Besides, we replaced the part and the problem disappeared as did the resistance reading.

HTH

Mark

The 185 ohm one was probably a temperature gauge sending unit, which is shaped just like the other, but is a variable resistor (rheostat) instead of a switch. Original Merc is usually a switch in one head, and a sender in the other. If you aren't running a temp gauge, it would be a good thing to put a temp switch in where the sender was and wire it in parallel. That's what you did.

I would assume that some astute mechanics and owners did that as a routine upgrade, as it would warn them of a head gasket problem on one side which might be missed by the original not-connected temp gauge sender.

hope it helps
John

 

[Texasmark]

Re: constant beeping 1999 XR6

Hear you on the sender John. I read a thread (sometime back) where an earlier model V had just one sensor. I thought that was stupid (from an OEM design point) as there are stats on both sides and if the stat on the side with no sensor froze closed, you are in trouble. So I just assumed in later model engines they decided to put one in each side.

Thanks,

Mark