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I think I figured it out. After watching several YouTube videos.
The problem seem to be that I needed to have a separate 12 volt connection to the post labeled “power supply”. Without that the solenoid would not transfer power to the post labeled starter.
The post labeled “Ignition switch” is where I landed the input from the ignition switch, post #4.
It seems to work now, I can now start the tractor from the ignition switch.
The relay has 4 posts, see the attachment I included.
Hi David,
Thanks for the info. I was wondering if you had a wiring diagram to hook up the relay I received. I want to make sure I am hooking it up right. The lettering on the replacement starter relay is written in Chinese. I used a translator app and I have attached a copy of that to this reply.
Sorry I am such a doofus when it comes to electronics.
Katfish
Update:
I found the problem, it was the starter relay. I have one on order and hopefully the problem will be fixed. It will be nice to start the dozer using the ignition switch and not a remote starter switch.
Thanks again for everyone’s help.
katfish
Hi David,
I read your reply to Nooie regarding the bypass of the OEM starting switch. I think this may solve the problem I have with my Yuchai dozer. I installed a new ignition switch but the tractor will still not start. To start it I have to use the “screwdriver” trick at the starter.
Would you mind sending me a wiring diagram of your solution?
I would greatly appreciate it.
Thanks,
Katfish.
Okay, so the saga continues;
I installed the replacement ignition switch with no problems. However, now everything works, the light switches, the amp meter, the tach, etc. Everything but the starter, when I turn the key to the start engine position, nothing happens. This is the whole reason for suspecting the ignition switch in the first place. If I jump the starter at the starter the tractor starts up. What could be the problem?
I have attached the wiring schematic taken from the manual, perhaps someone with more experience can diagnose the problem and offer suggestions where I can look for potential problems.
I have marked the schematic with two question marks, what are these switches? if the switches malfunction could this be a problem?Thanks in advance for your help
By the way, as it turns out the key switch you suggested is the same model number as the one I am replacing. Thanks again for your help
Wow, lot of good information. I researched YouTube and found how to bench test the switch. As I suspected, the switch is bad. I have since then ordered a replacement switch from an online dealer. The original switch became suspect when I went to start my dozer one day and nothing happened as I turned the key to start. I thought the battery was dead so I put the battery on charge even though my meter said it had a good charge. After being on the charger overnight I tried again and the same thing happened; no start, no lights, no nothing. I was able to get the dozer started by placing a remote starting cable onto the starter. The dozer fired right up, no problem. However, this is not an ideal situation since I am bypassing the glow plug. I hope to have the dozer back in operation in order to complete spring and summer chores. Thanks again for all your help and advice.
Thanks David, for the information. Since placing this post I have looked into batteries and you are right, they are expensive. But I suppose it is a good investment. My bulldozer takes a lot of the physical labor off of me. I am still trying to decide which name brand to buy. Thanks again for your input.
Hi,
I am a long time member and just recently came back to the CTOA website. And alot has changed. Am I missing something cuz I cannot find anywhere to change/update my profile. I’ve included a screen shot to show the main menu bar. I see nothing with “my name”, am I missing something?
Help Please
Katfish
