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Jay
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« on: August 20, 2009, 08:03:43 AM » |
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A friend of mine has a 98 Tourer. His temp light flashed on for a second while he was going down the highway. Does the sensor located at the bottom left of the radiator activate the temp light as well as the fan?
Thoughts?
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DFragn
Guest
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« Reply #1 on: August 20, 2009, 08:20:22 AM » |
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I believe that's the fan and the warning light sensor feeds from the thermostat housing on top of the block. If I remember right.
Geez, if mine flashed for a second I doubt I'd even see it. I never look at it 'cause these things realy never over heat that easy.
I've got an accurate coolant temp gauge, sensor in the upper hose, and when it gets really hot it's @ 220* the oil temp matches up exactly, which is generally higher [avg. 205*] then my coolant [norm is 175-180*]. My light, to my knowledge, has never kicked on even at 225* while syncing the carbs in the garage. I melted my alternator cover though...
Highway! Was he is stop-and-go traffic? AZ desert?
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Jay
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« Reply #2 on: August 20, 2009, 09:17:52 AM » |
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He said he was doing 80mph. I can't see any way that it would be running hot with that much air blowing through the radiator. Like you said, I don't think that I would notice a quick flash from that light while riding at that speed either. Thanks for the reply, I'll have him keep an eye on it.
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sandy
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« Reply #3 on: August 20, 2009, 09:45:01 AM » |
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The '97-98's had temp sensors that fail. Mine flashes on frequently but the oil temp is fine. Someday I'll order one and pull the radiator and replace it but I don't let it bother me.
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Ricky-D
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« Reply #4 on: August 20, 2009, 11:55:33 AM » |
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Well, if you're riding with a really strong tailwind there could possible be a moment or two where the fan might come on. I don't know about the light though. The only time I see it is when I start the bike.
***
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2000_Valkyrie_Interstate
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Tundra
Member
Posts: 3882
2014 Valkyrie 1800
Seminole, Florida
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« Reply #5 on: August 21, 2009, 03:37:11 AM » |
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Jay, I know several friends who have had this problem, including myself. I pulled my hair out with this, changed the thermostat, sending unit and sensor which are all located near the thermostat housing on the top of the block. Still had the same problem.
Turns out there is a Indicator unit under your sidecover. This fixed the problem on ALL of our bikes. Don't waste your time pulling the radiator, the sensors and sending units rarely go bad.
I tried to pull the micro-fiche and part number for you, can't find and out of time. If I find that part number I'll post it for you.
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If you can't be a good example: be a WARNING!!
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Hoser
Member
Posts: 5844
child of the sixties VRCC 17899
Auburn, Kansas
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« Reply #6 on: August 21, 2009, 04:57:54 AM » |
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$he temp lite does not normally come on when the bike is started.
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I don't want a pickle, just wanna ride my motor sickle  [img width=300 height=233]http://i617.photobucket.com/albums/ |
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woefman
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« Reply #7 on: August 21, 2009, 07:07:04 AM » |
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$he temp lite does not normally come on when the bike is started.
I Agree  |
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Ricky-D
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« Reply #8 on: August 21, 2009, 12:40:29 PM » |
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$he temp lite does not normally come on when the bike is started.
$he temp lite does not normally come on when the bike is started.
I Agree Right out of the owners manual: Page 14 Gauges, Indicators & Displays "The low oil pressure indicator and coolant temperature indicator come on when you turn the ignition switch ON so you can check that they are working. The indicators remain on until after the engine is started. *** |
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2000_Valkyrie_Interstate
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Chillerman
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« Reply #9 on: August 22, 2009, 11:32:40 AM » |
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$he temp lite does not normally come on when the bike is started.
$he temp lite does not normally come on when the bike is started.
I Agree Right out of the owners manual: Page 14 Gauges, Indicators & Displays "The low oil pressure indicator and coolant temperature indicator come on when you turn the ignition switch ON so you can check that they are working. The indicators remain on until after the engine is started. *** You are correct for the Interstate. For the Standard/Tourer the temp light should not come on when the ignition switch is turned, if it does come on there is a problem. |
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The problem with Socialists is they eventually run out of other people's money to spend!
Some people are too stupid to realize how ignorant they are.
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Valker
Member
Posts: 3000
Wahoo!!!!
Texas Panhandle
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« Reply #10 on: August 22, 2009, 09:42:50 PM » |
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mine flashes too occasionally (114,000 miles) 98 Tourer. If you find the part number, please let us know (for the thing that fixed it). I don't understand which part you were referring to. It usually happens while at speed and it is NEVER overheating. ???
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I ride a motorcycle because nothing transports me as quickly from where I am to who I am.
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RP#62
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« Reply #11 on: August 22, 2009, 10:49:20 PM » |
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On the 97-99 model standards and tourers, there is a Thermo Sensor in the thermostat housing that sends signals to an Engine Coolant Temp Indicator Unit (under the left side cover). The Engine Coolant Temp Indicator interprets those signals and decides when to turn the Coolant Temp Indicator Light on. On the later models, Honda eliminated the Engine Coolant Temp Indicator Unit and replaced the Thermo Sensor with a Thermostatic Switch. The Thermostatic Switch turns the Coolant Temp Indicator Light on directly.
In the past, intermittent Coolant Temp lights on 97-99s have been caused by failing Engine Coolant Temp Indicator Units. Instead of replacing Engine Coolant Temp Indicator Unit, you can replace the Thermo Sensor with the Thermostatic Switch from the later models and jumper the connectors that went to the Engine Coolant Temp Indicator Unit. This fixes the problem, simplifies the circuit and saves you some money.
-RP
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Tundra
Member
Posts: 3882
2014 Valkyrie 1800
Seminole, Florida
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« Reply #12 on: August 23, 2009, 04:47:46 AM » |
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On the 97-99 model standards and tourers, there is a Thermo Sensor in the thermostat housing that sends signals to an Engine Coolant Temp Indicator Unit (under the left side cover). The Engine Coolant Temp Indicator interprets those signals and decides when to turn the Coolant Temp Indicator Light on. On the later models, Honda eliminated the Engine Coolant Temp Indicator Unit and replaced the Thermo Sensor with a Thermostatic Switch. The Thermostatic Switch turns the Coolant Temp Indicator Light on directly.
In the past, intermittent Coolant Temp lights on 97-99s have been caused by failing Engine Coolant Temp Indicator Units. Instead of replacing Engine Coolant Temp Indicator Unit, you can replace the Thermo Sensor with the Thermostatic Switch from the later models and jumper the connectors that went to the Engine Coolant Temp Indicator Unit. This fixes the problem, simplifies the circuit and saves you some money.
-RP
What RP #62said! RP#62 you posted this some time ago for me. Funny how NO ONE else new this. Even several HONDA dealers. Thanks for the info. again, fixed my problem! I found my receipt, this is the part number I used from HDL. However this has been several years back. (Part # 38710-MZO-003, Indicator unit, $39.96.) |
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« Last Edit: August 24, 2009, 03:39:33 AM by Tundra »
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F6Dave
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« Reply #13 on: August 24, 2009, 04:07:06 PM » |
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Yes, the older Valks had a more complex and less reliable system for the temp light. It used a separate sensor and switch that turned the light on when the sensor indicated a high temp.
My light flashed on from time to time for about 2 years. I knew it wasn't overheating, since the fan still came on as usual, and the light would flash at times when I KNEW it wasn't running hot (like a 40 degree morning at highway speed). I even removed and tested the thermostat in a pot of boiling water.
I could have replaced the switch (under the left side cover), but decided instead to upgrade to the later hardware. The sensor was easy enough to replace (same threads), though it had a different connector so I had to make an adapter. The jumper under the side cover required 2 home made connectors to fit into the slots in the plug. I could have cut and spliced the wire but decided to leave the plug in place in case I decided to retrofit the original parts.
A year later all is running fine.
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