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!
Questions about Start/Run/Stop switch
- Thread starter Robiet
- Start date
Mr. Wright
Knows some things
This is going to sound really dumb, so bare with me. First, what battery did you put in it? Did you charge it before you put it in? It's not uncommon for new batteries to be junk. They could have been dropped or cheaply made. We recommend Deka batteries, part # ETX20L, 310cca.
Keep the feed back coming, we'll get it figured out.
Keep the feed back coming, we'll get it figured out.
Mr. Wright
Knows some things
Do you know that after you turn the key on, you have to push the run button before the start button?
Can you post a picture of the lights that come on , on the EHC when you turn the key on.
Sorry for the simple questions, but some time it's a simple problem.
Can you post a picture of the lights that come on , on the EHC when you turn the key on.
Sorry for the simple questions, but some time it's a simple problem.
Thanks for replying and yea I know the start sequence. It's at my hobby shop. I can take a pic tomorrow. I'm not getting any function out the the hand controls. I took the right side off and found a 6 pin connector. Looked up a wiring diagram and found that the black wire is ground, red is run, and green is start. Now, from black to red is showing 8.5 volts as well as black to green. What I'm trying to find out is if 8.5 volts is correct for those 2 circuits. If not, I'll need a cdi.
Jersey Big Mike
100K mile club
12.6 is not good. A New fully charged battery should be 12.8
The old one will not likely work well in a Big Dog.
This is not to say you may not have other issues.
Unlike most bikes that run 12v to the switches, all the switches on a BDM are active when pulled to a ground state.
Grab the manuals and that will help a lot.
The test is when you press the switch that the signal back to the EHC should be 0V
8.5 sounds low but I've never measured it as it's not going to be 12v work 8v doesn't at the switch level since for a switch is 0V (when closed)
easiest is to disconnect battery and test switches at the handle bar -- the pcbs there have been known to be problematic.
Also open the headlight bucket and check the connectors -- there were some problem ones that shorted and caused many issues.
Feedback to this forum what you and the results and we'll get you going.
That's some helpful information. I'll order the deka battery and control switches tomorrow. I tested the switch as best I could my putting my leads on the on the black ground pin and then the red run pin and saw no continuity while depressing the switch. Same with black and green pins. I was worried when I saw the 8.5v thinking that the ehc is bad. Hoping for confirmation on that voltage either way. I suppose I'll just have to wait for the switch to come to make that call.
Jersey Big Mike
100K mile club
Before you order switches, try using a jumper between the wires to bypass the switch and see if it works.
ie -- connect black ground to wire for run, then connect black wire to start and see if she turns over/starts.
Mr. Wright
Knows some things
Thanks man. I've already tried jumping the pins in the connector with no action. That's what prompted me to test the voltage there. I confirmed that my black is a good ground. I found a pin diagram for the ehc and unplugged it. Found the two pins that turn it on and jumped them, then I tested the pins there that correspond to the red and green wires at the switch to rule out a wiring issue. Same 8.5v on those pins. Some like ignition or coils were down in the 6-7v range. Seeming like a faulty ehc but I'll wait for the switch to confirm. I'll be heading down to my hobby shop soon to look at it some more.
Awesome thank you!!Dropbox
www.dropbox.com
Mr. Wright
Knows some things
Also weyback and re-read your post. I missed that it was an 04. We're not going to jump to conclusions yet, but in 04, that was the first year for those circuit board. They were redesign in 05 because of problems.
I still have the original boards in my 04, but if that bike has sat for a while, the board might be corroded.
I still have the original boards in my 04, but if that bike has sat for a while, the board might be corroded.
Mr. Wright
Knows some things
I'll go to my shop today and get a picture of the boards. And diagrams. In the mean time get me a picture of your EHC. By the way, what color is it. Black or a silver coldish color?
Jersey Big Mike
100K mile club
And just to be perfectly clear (since we can't see what you're doing) You jumped the GROUND wire to the RUN wire and released, then JUmped the GROUND to the START corrrect?
Yes just as if a momentary switch was doing it.
Please keep in mind these bikes used, a low voltage on the single wires, when they are taking to ground that input is true in the EHC. A ohm meter is a good tool. Voltage test are confusing sometimes.
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.
Attachments
Mr. Wright
Knows some things
Here's the diagram for the pc board so you can check continuity.
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!