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1Back to top Go down   Temperature Relay Empty Temperature Relay on Mon Apr 06, 2015 1:53 am

Oliveri

Oliveri
Silver member
Silver member
Hi everyone,

Just read 'floyd's' thread re. Temperature Relay - Cooling fan not working. It appears that i'm having similar issues. Tested all possible connections but cant get the fan to work by jumping the sensor connections ("E" with the relay present in the socket). 

So I opened the relay: Temperature Relay Temp-relay 
...as you can see there is a burnt out circuit (on the left). Same spot as floyd's. 

Hmmm, what to do now? Can this be fixed (bridged with solder)? Or do i need to buy another? If i do need a new one, where can i get one for a reasonable price.


__________________________________________________
"Keep the paint up, and the rubber down

1988 K100RT...#0096960 ..."Heisenberg" ...Status: Work in progress
http://www.oliveris.com.au
    

2Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Mon Apr 06, 2015 2:55 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I'd do the solder bridge first.  But before I fired it up I would be checking the external wiring the burnt trace connects to.  Who knows, maybe it will work.  At least if there is still a problem you won't be burning up a new temperature module.


__________________________________________________
Present:
1994 K75RT
1991 K100RS
1988 K100RS SE

Past:
1994 BMW K75S
1992 BMW K100RS
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

3Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Mon Apr 06, 2015 3:18 am

charlie99

charlie99
VIP
VIP
see if the fan is seized first ....could be drawing heaps of amps on activation

get a stick and try and turn the fan ?


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OTemperature Relay Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

4Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Mon Apr 06, 2015 3:46 am

Oliveri

Oliveri
Silver member
Silver member
...everything appears to work fine when i 'bridge' the contacts on the relay connector plug. 

 - Fan works
 - Overheating light works

I also tested the resistance on the temp sensor (cold & hot) and it appears to be OK. 

However, with the relay connected i cant get any action from the fan by trying to earth 'E'.

I think the relay may have been fried when i played around with the old battery,....jump starting & all. Sad


__________________________________________________
"Keep the paint up, and the rubber down

1988 K100RT...#0096960 ..."Heisenberg" ...Status: Work in progress
http://www.oliveris.com.au
    

5Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Mon Apr 06, 2015 5:11 am

charlie99

charlie99
VIP
VIP
do the "bridge"   but use a short piece of wire of small diameter (.25 mm ?) to join the two connection points

this will act as a fuseable link should anything happen in the future

good luck


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OTemperature Relay Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

6Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Mon Apr 06, 2015 6:40 am

Oliveri

Oliveri
Silver member
Silver member
will do, thanks Charlie.


__________________________________________________
"Keep the paint up, and the rubber down

1988 K100RT...#0096960 ..."Heisenberg" ...Status: Work in progress
http://www.oliveris.com.au
    

7Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Tue Apr 07, 2015 12:56 am

Holister

Holister
Life time member
Life time member
@Oliveri wrote:......
Hmmm, what to do now? Can this be fixed (bridged with solder)? Or do i need to buy another? If i do need a new one, where can i get one for a reasonable price.
EME don't appear to have any. You can buy one from Munichmotorcycles.com.au in Perth if you're in a hurry (they put it in an overnight bag for $10) but they're pretty pricey. Last time I looked I think they were well over AU$150 but Motorbins in the UK have them for around ½ that price incl frt I think???


__________________________________________________

1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
  Temperature Relay Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

8Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Tue Apr 07, 2015 3:35 am

Oliveri

Oliveri
Silver member
Silver member
Ok, so I created a 'bridge' with a small piece of wire as per charlie's suggestion. 

But now the bike will not start my fuel pump is not running and the #6 fuse keeps blowing.

So it appears that the bridge i created is now blowing the #6 fuse that also controls the fuel pump and FI. 

Removed my bridge, bike starts again & no blown fuses. 🇳🇴  Not sure why it didn't work. But it was worth a shot....

I just hope that there is no other underlying issue that will destroy a new relay once i get one....


__________________________________________________
"Keep the paint up, and the rubber down

1988 K100RT...#0096960 ..."Heisenberg" ...Status: Work in progress
http://www.oliveris.com.au
    

9Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Tue Apr 07, 2015 5:46 am

charlie99

charlie99
VIP
VIP
ok ...if the bridge then makes other things fail ...one needs to look at the component side and see whats causing the problem

I suspect ...(but haven't looked at the images yet ) that here is a blown component ...possibly a diode that has failed causing this issue ...once they go you need to replace

ill have a look at what images and explanation I can find ...

back later


edit

blast cant find the image I thought I had

anybody with a pic of the component side ????



Last edited by charlie99 on Tue Apr 07, 2015 11:29 am; edited 1 time in total


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OTemperature Relay Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

10Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Tue Apr 07, 2015 10:10 am

Holister

Holister
Life time member
Life time member
Oliveri, can you post a good close-up of the component side of that board?
Cheers mate


__________________________________________________

1989 K100RT     VIN No.  0097367 (naked)  
1996 K1100RS   VIN No.  0451808
  Temperature Relay Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

11Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Wed Apr 08, 2015 8:50 pm

Oliveri

Oliveri
Silver member
Silver member
Sorry for  the delay. Work gets in the way of the important stuff from time to time. Here is the image of the component side.

Temperature Relay Temp-Relay21

It's the connection between the 2 diodes (red arrows) that appears broken.


__________________________________________________
"Keep the paint up, and the rubber down

1988 K100RT...#0096960 ..."Heisenberg" ...Status: Work in progress
http://www.oliveris.com.au
    

12Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Wed Apr 08, 2015 9:25 pm

RicK G

RicK G
VIP
VIP
Have you tested the two diodes by putting the meter across then reverse the leads to see if they only conduct in one direction. Looking at that circuit there is a fair possibility that one of them is short circuit.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

13Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Fri Apr 10, 2015 4:22 am

T3CHNO1D

T3CHNO1D
active member
active member
Could also be the transistor connected to those diodes (3 diodes in all). Best way would be to un-solder one end of the 3 diodes to test each one isolated, and then test the transistor once one end of each diode is un-soldered.

Very simple circuit, easy to fix, all parts are still available, quad-comparator takes in signal and turns relay on/off depending upon signals. About $10-$15 in parts to replace everything but the relay.

    

14Back to top Go down   Temperature Relay Empty Re: Temperature Relay on Fri Apr 10, 2015 5:02 am

Oliveri

Oliveri
Silver member
Silver member
Thanks for all the helpful info guys. Today I went to a guy not far from me (Ray Peake - RJ's BMW Motorcycle Service) who had a spare relay, $40 problem solved. 

I will keep the old one and will get the relevant diodes to fix it (when i'm really bored one day). 🤡


__________________________________________________
"Keep the paint up, and the rubber down

1988 K100RT...#0096960 ..."Heisenberg" ...Status: Work in progress
http://www.oliveris.com.au
    

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