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Wayne, Journeyman
Category: Heavy Equipment
Satisfied Customers: 12999
Experience:  34 years experiance as engine rebuild and problems.Thermo-King repair and trouble shooting.
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I have a 2012 hino 258 it had bad batteries so I went and

Customer Question

Hi there I have a 2012 hino 258 it had bad batteries so I went and bought new ones the caps red was negative and black was on positive so when I hooked up the cables + was on -- when I started to hook up negative cable to the battery noticed right away that it was wrong the cables were only on for a couple of seconds so corrected it now the glow plug sign doesn't come on and the truck will not start is there a relay that controls it what should I be looking for thanks
JA: Please give me a sec to read that.
Customer: ...
JA: Thanks for your question. We'll do all we can to help. What is the complete model and serial number of your machine?
Customer: 2012 hino 258 vin 2ayne8jt0c3s19450
JA: Anything else you want the Equipment Mechanic to know before I connect you?
Customer: That's about it
Submitted: 9 days ago.
Category: Heavy Equipment
Expert:  Wayne replied 9 days ago.

Hi, I'm Wayne.

I'll be assisting you with this issue today.

Thank you for coming to Just Answer

Your Question is as important to us as it is to you.

I am sorry to hear you are having this issue.

You blew a fuse, need to check all the fuse with a voltmeter, not just looking at them.

Also should be a fuse in the wire harness for the ECM.

It will be an inline fuse in the harness near ECM.

I hope this helps you.


Customer: replied 9 days ago.
Thanks I'll let u know how I make out
Customer: replied 9 days ago.
How do I find the ECM harness
Expert:  Wayne replied 9 days ago.


Thank you for the response.

The ECM is bolted to the side of the engine or on the firewall.

It has 2 big plugs that go to it with 18-22 wires each plug.