1987 1200 water pump


Information and questions on GL1200 Goldwings (1984-1987)
  • Sponsored Links
MickeyM88
Posts: 2
Joined: Wed Aug 20, 2014 4:38 pm
Location: Hampton, SC
Motorcycle: 1987 GL1200 Aspencade

1987 1200 water pump

Postby MickeyM88 » Mon Sep 29, 2014 9:07 am



I just purchased a 1987 Aspencade Goldwing Honda with 69,000 miles on it. I'm new to working on a Motorcycle or trouble shooting issues. My issue is the temp bar gage all of a sudden does not show any bars, the fan is not coming on yet I can tell the water temp are high when I sit and idle. The water pump or any other water related items are not leaking. I have replaced the two sensors and t stat. My question is

How can I determine if the water pumps not working properly? Obviously the water temps are going up but the water temp gage does not indicate any bars. One min everything is working fine then the next min. no gage, is it possible that the water pump just quit working stopping water flow therefor the sensors can not detect water temps which in turn will not light up the gage?


Thank you for any help or direction you can provide, Michael :?



User avatar
virgilmobile
Posts: 7653
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 1987 1200 water pump

Postby virgilmobile » Mon Sep 29, 2014 9:43 am

MickeyM88 wrote: is it possible that the water pump just quit working stopping water flow therefor the sensors can not detect water temps which in turn will not light up the gage? :?


No...your problem is electrical...or more precisely...lack of it..

Your temp gauge is digital...correct.??
The temp indicator circuit is tied to the temp sending unit...as the temp rises,the resistance of the sensor changes...
That your indicator does not show anything,indicates it lost all connectivity to the sensor...There is a plug near the display...it it suspect...(there's always the display itself being intermittent)...
I believe the temp sensor wire is green/blue all the way from the plug at the dash to the sensor...The sensor has a solid green wire that should be verified grounded...
Temp sensors usually have a high resistance (150 ohms) when cold and low (15 ohms) when HOT...
I'd suggest using a DVM...Common ground to the battery...key OFF...probe the plug that comes out of the dash(locate the green/blue wire) and measure resistance....Expect it to be around 150 ohms...
If there's no resistance,probe near the sensor and measure the sensor itself...

MickeyM88
Posts: 2
Joined: Wed Aug 20, 2014 4:38 pm
Location: Hampton, SC
Motorcycle: 1987 GL1200 Aspencade

Re: 1987 1200 water pump

Postby MickeyM88 » Wed Oct 01, 2014 9:57 am

Good morning Virgilmobile, I wanted to sat THANK YOU for your help!! You did give me a correct direction to go in, while looking for a ground issue I found a connecter that was not plugged into each other. Once I plugged them in, the problem was resolve! It was extremely tight and difficult to get to, had to take everything out of my way hidden by the frame. But it was worth the trouble, I'm on the road again!

Thanks again for your response and direction!

Michael :D

User avatar
virgilmobile
Posts: 7653
Joined: Sun Sep 19, 2010 5:39 pm
Location: Denham Springs,La.
Motorcycle: 1988 GL1500 I
Previously owned
78 GL1000
81 GL1100
82 GL1100 I
83 GL1100 I
83 GL1100 standard
84 GL 1200 I

Re: 1987 1200 water pump

Postby virgilmobile » Wed Oct 01, 2014 10:22 am

Wonderful...glad you found it...
By the way....sense your new to this wing,have you considered replacing the timing belts...??
It's the right miles and age for it...
Hows the charging system..Is the battery volts staying between 13.4 and 14.5 when your running about.?
The "3 yellow wires" are a weak point...
Also,If the bike has been outfitted with extra lighting...they better be LED...There's not a lot of extra power in the system ...Not even enough run a couple of 55 watt driving lights....




Return to “GL1200 Information & Questions”




Who is online

Users browsing this forum: AhrefsBot [Bot], Yahoo Slurp [Bot] and 2 guests