Questions about Start/Run/Stop switch

[Robiet]

I also have a 2004. Electrical problems can be hard to trouble shoot sometimes. Mr. Wright is very experience with these bikes. He helped me a lot. I would start by disconnecting the battery get a good ohm meter. Disconnect the plug at the EHC and check from the plug to ground. Study your wiring diagram, you should be able to check all the input switches from there. Also check witch pins read to ground!!! If any read to ground that shouldn't start trouble shooting there first.

Thank you. I've tested for grounds in the harness and haven't found any. I didn't get a chance to go work on it today. I run an industrial electric motor service so I'm a bit ahead of the curve when it comes to testing components. This one has me stumped tho. I keep learning more about it everytime someone replies to this thread. I'm confident that we are going to figure it out

 

[Jersey Big Mike]

Thank you. I've tested for grounds in the harness and haven't found any. I didn't get a chance to go work on it today. I run an industrial electric motor service so I'm a bit ahead of the curve when it comes to testing components. This one has me stumped tho. I keep learning more about it everytime someone replies to this thread. I'm confident that we are going to figure it out

If the harness is connected to the EHC, there should be MANY wires that are grounded (all those thin black wires)
Did you mis-type and mean no shorted wires?

 

[1 B.M.F.]

Here is what each light means on your ehc
Is this the ehc you have or has someone replaced it with a newer one.

 

[Rottweiler]

View attachment 81442
Here is what each light means on your ehc
Is this the ehc you have or has someone replaced it with a newer one.

He has the 2004 it is a one year only model. Only one wire connector.

 

[Mikeinjersey]

Awesome thank you! I got a rush service call at my shop early today and didn't make it down to work more on the bike. I'm going to check the pcb board asap tomorrow. This forum has been awesome!

Welcome from NJ,
Give this video a look. Perfect for testing your PCB created by Eric from HDM . You will be doing business with HDM for sure if you own a Dog>

 

[Mikeinjersey]

Hello all. Just joined the group on the recommendation from a fella on the FB forum. I just bought an 04 Ridgeback from an auction super cheap but without any clue what's wrong with it. So, I get it in my hobby shop and put a good battery in it. Turn the key and the ehc lit up. That's it. No lights or gauge. The start but is also non-functional. I found a wiring diagram and took the switch off. I tested for voltage from black to red and black to green. 8.5VDC. I would expect it to be 12vdc indicating a faulty ehc but being as it's all computer controlled it doesn't necessarily have to be. I did get another set of hands and we did our best to test the switch finding no continuity. I found a pin diagram for the ehc and tested it directly ruling out a wiring problem and got 8.5 volts at the corresponding pins. Does anyone know what the correct voltage is at that 6 pin connector? Any help would be very much appreciated!

It may be a blessing the bike didn't crank. Maybe you already did this but since you know nothing about the bikes history ,except it's been sitting a long time, you should make sure the cylinders are well lubricated before you start cranking. One of the guys on this site will probably have a good total procedure to go through before lighting off the engine and possibly damaging the cylinder walls with a broken ring.
It can not be overstated that the electrical system on this bike wants a healthy battery and above all good grounds. Make sure all your connections are clean and tight. I'm not sure were an 04 battery grounds (frame or starter mount) but double check it. Also pull the EHC connectors and replace the dielectric grease.
One step at a time and you will be cruising before you know it

 

[Robiet]

If the harness is connected to the EHC, there should be MANY wires that are grounded (all those thin black wires)
Did you mis-type and mean no shorted wires?

I meant that there were no grounds on the wires associated with start, run, ignition.

 

[Robiet]

 

[Robiet]

View attachment 81485

This is my ehc currently and my jumper from the black to red (run) that I put in. Nothing. Tried to jump in the green (start) wire and again nothing. Ya guys think I'm just fighting a bad ehc? They're not terribly expensive but I'd sure be bummed to buy one and still not fix it. Just trying to clear all other possibilities before I do. You guys have been unbelievably helpful and I really do appreciate it.

 

[Robiet]

Welcome from NJ,
Give this video a look. Perfect for testing your PCB created by Eric from HDM . You will be doing business with HDM for sure if you own a Dog>

Watching now.

 

[Robiet]

Watching now.

Man that's awesome. Now I see that the gauge lights up when the key is on. Mine doesn't even do that. Totally dead.

 

[Jersey Big Mike]

View attachment 81485

those lights indicate if I am not mistaken that almost all the circuits are activated. Usually there are only a few lights on.
Personally at this point I would PULL the EHC out and connect Power and ground only
Check for lights
Use a jumper to ground ehc pin for run
check lights only power up yellow
use a jumper to ground start ehc pin
check lights - yellow, green and blue (compression release)

If that passes, I would disconnect as many of the jst connectors as possible and add them back one at a time
Do switches first and watch for correct lights on ehc
add back front TS/RUN - test
add back rear TS/RUN/Stop - test
add horn
etc
Do headlight last.

basically isolate and test as much as you can.

 

[Robiet]

those lights indicate if I am not mistaken that almost all the circuits are activated. Usually there are only a few lights on.
Personally at this point I would PULL the EHC out and connect Power and ground only
Check for lights
Use a jumper to ground ehc pin for run
check lights only power up yellow
use a jumper to ground start ehc pin
check lights - yellow, green and blue (compression release)

If that passes, I would disconnect as many of the jst connectors as possible and add them back one at a time
Do switches first and watch for correct lights on ehc
add back front TS/RUN - test
add back rear TS/RUN/Stop - test
add horn
etc
Do headlight last.

basically isolate and test as much as you can.

I think that's very good advice and I'm going to do it now. I noticed on the hdm video posted that when you turn the key on, the gauge lights. I'm not getting that. Only thing that comes on is the ehc.

 

[Robiet]

I think that's very good advice and I'm going to do it now. I noticed on the hdm video posted that when you turn the key on, the gauge lights. I'm not getting that. Only thing that comes on is the ehc.

Ok I pulled it connected to 12.8 volts from one of my electric motor test panels. When I connect pins 18 and 19 the unit powers up but all the lights that were on in the pic light with nothing else connected.

 

[Mikeinjersey]

Ok I pulled it connected to 12.8 volts from one of my electric motor test panels. When I connect pins 18 and 19 the unit powers up but all the lights that were on in the pic light with nothing else connected.

When you turn the key on EHC gets powered. The lights you are seeing on the EHC indicate Faults on the respective circuits. Faults are Opens, Shorts or Over-currents condition. Put a good fully charged battery in the bike. With the EHC plugged in start Troubleshooting to isolate the problem or problems. Disconnect circuits and look for change. All bets are off if you have a shitty battery or shitty ground to the frame the Ehc will do crazy shit.
You got the bike at auction so indeed the EHC could be wasted but not necessarily. Pull your headlamp and look for a shorted connector . Very popular failure . That's just one check , your lighting the tree so I would be looking under the tank and seat for broken or damaged wires as well.
Again nothing matters if you don't have 12.8v and perfect ground.

 

[Robiet]

When you turn the key on EHC gets powered. The lights you are seeing on the EHC indicate Faults on the respective circuits. Faults are Opens, Shorts or Over-currents condition. Put a good fully charged battery in the bike. With the EHC plugged in start Troubleshooting to isolate the problem or problems. Disconnect circuits and look for change. All bets are off if you have a shitty battery or shitty ground to the frame the Ehc will do crazy shit.
You got the bike at auction so indeed the EHC could be wasted but not necessarily. Pull your headlamp and look for a shorted connector . Very popular failure . That's just one check , your lighting the tree so I would be looking under the tank and seat for broken or damaged wires as well.
Again nothing matters if you don't have 12.8v and perfect ground.

Ok. Deka battery shipped today.

 

[Jersey Big Mike]

Ok I pulled it connected to 12.8 volts from one of my electric motor test panels. When I connect pins 18 and 19 the unit powers up but all the lights that were on in the pic light with nothing else connected.

How do the contacts look in the bottom of the EHC, is there any corrosion? Can you see any corrosion in the socket?
Get some contact cleaner and spray both the contacts and socket.
before re-assemblying apply dielectric grease.
reconnect and see if anything changes.

I agree with Mikeinjersey that you shold check both the headlight bucket and under the tank

 

[Rottweiler]

Here is some of my notes from when I was trouble shooting mine.

What is power on test. Key switch only before run button is pressed.
Headlight
Front and Rear running lights
Speedometer
Tachometer
Annunciator
Speedometer Sensor
Tag Light
Handlebar controls

After run button all above plus ignition and coil




The EHC lights will fault on

OPEN / SHORT OR OVER CURRENT CONDITION

 

[Rottweiler]

 

[Rottweiler]