Massimo 500 Won’t crank with key

[owencole15]

Massimo 500 will only crank when I jump solenoid with screwdriver cranks right up and runs great. But won’t start with key doesn’t do anything when I turn the key. Only thing it does is power everything as in dash and fuel pump then have to jump solenoid to crank up and drive. 

[T-boss 410]

My T-boss 410 does the same thing, but intermittently. Mine is probably a loose wire at the starter. Or the starter relay. I haven't checked mine yet, but let me know if I have helped!

[owencole15]

Yeah I checked all that. Can’t be loose because it fires right up when jumping the solenoid. Gonna mess with it more today after work. Will let you know if I find anything 

[T-boss 410]

Maybe the ignition switch?

[owencole15]

I was thinking that when I had a buddy turn over the key and my power probe hooked to my solenoid its taking power away... so I don’t know if the points are bad in the ignition switch or my solenoid is bad? I have a solenoid on order I’ll change that if that don’t fix it then I’ll order a ignition switch. 

[T-boss 410]

Let me know, please. Could make it easier to locate the issue with mine. 

[Verno]

Might try your brake light switch.  If it doesn't know your foot is on the brake, same result.

[T-boss 410]

Yeah, that's one of the things I was going to check. I want to check the starter relay, but I'm not sure where it's located. 

 

[T-boss 410]

Have you discovered anything?

[owencole15]

No. I changed the ignition and solenoid with starter relay. Still nothing ended up going to auto parts store and buying a push button ran it straight to the solenoid so all I have to do is turn key on for fuel pump and all electrical stuff then push button and fires right up. Easy to do and now I don’t have a headache. Got tired of throwing money at it. 

[owencole15]

@T-boss 410 I just drilled a hole in the dash and mounted push button there looks clean and works great. Cost me for switch and wire like $30 

[T-boss 410]

Does that mean it was most likely the starter switch? Kinda sounds like you narrowed it down to that, given that everything else functioned properly after you installed the new starter button. 

[owencole15]

It could be or it’s something in that stupid fuse box design where one of the relays are bad that you can’t replace you have to buy the whole box for $100 could be one of the  relays not allowing the ignition to work properly. So that’s why I just ended up putting the button on it. Still have to have the key to start so it will do for me. 

[T-boss 410]

Don't mean to be a pain, but could you possibly draw up some sort of diagram of how you wired the button?

Thanks!

[owencole15]

On your solenoid you have a positive and negative run wire from each to a two prong push button once you do that and aslong as you don’t have a bad battery a your solenoid is good it will fire right up I attached a picture of a drawing that explains. 

[T-boss 410]

Thanks much! Mine is intermittent, but if I can't track down the issue, I just may install your fix.

Is the ignition switch only available through the dealership? If it's a poor design, I would prefer to go with an aftermarket switch. I don't know how to cross reference the switch, or I would go that route. 

[owencole15]

I’m not 100% positive I just went on eBay and got mine. 

[T-boss 410]

Initially, I was impressed by the detail that went into the manufacturing of the Massimo. But I may be premature about that, if in fact they have used cheap parts. Assuming that my model is different than yours, where is your ignition switch located?

[ElbowRoom]

I have the exact same problem with a 2018 Odes Dominator 1000 cc. I still haven't found the cause of the problem. I "fixed" it by running a wire from the solenoid "I" terminal (the small terminal that is NOT connected to the ignition switch) to the frame. It now always starts instantly without waiting for the pump to do its thing first. The problem is solved but I still want to know what's causing it, if someone knows.

[Gordon]

I have a 2018  Massimo t-boss 550 it's not getting power to the injector but my key switch is not working could that be the problem?

[T-boss 410]

Do you hear the fuel pump prime when you turn the key?

[James strambler]

I am troubleshooting the same problem, turn the ignition switch you get power to the dash, no crank, no brake lights. I ordered a brake pressure switch on the master cylinder, I will replace it next.

[T-boss 410]

Were you able to locate the issue?

[ElbowRoom]

Yes, the main ground wire was loose on the passenger side of engine. I cleaned and tightened the connection, and everything 's been perfect ever since.

[T-boss 410]

Good to hear that you got it figured out.

[ElbowRoom]

Hopefully, my solution will help you solve your problem.

[T-boss 410]

So, the problem all along was a loose ground wire? Now everything is functioning properly?

[ElbowRoom]

Yes. It took a long time to get there. I tried to fix it by changing many parts that did not need to be changed: starter solenoid, battery, ignition switch, ignition button, starter.
I read somewhere that a bad ground could cause many such problems. I looked until I found the loose ground. It was staring at me the whole time near the center of the passenger side of the engine.

[T-boss 410]

Thanks for that info. I guess I will be checking all the grounds on my UTV. Great info. Thanks for passing it along.

[James strambler]

I bypassed my ignition switch and went to the solenoid connector. I ran a wire from my positive side of my battery to the push button switch, and from the other side of switch to the red/yellow wire of solenoid. I took the green wire from solenoid to frame ground. 
 

But I will check for a loss ground on the side of engine.