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Mike S.
Mike S., Chevy Mechanic
Category: Chevy
Satisfied Customers: 7011
Experience:  ASE Certified Master Technician
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Ran a wire instead of a fuse at the eng 1 plug blew the ing

Customer Question

Ran a wire instead of a fuse at the eng
1 plug blew the ing a fuse replaced it all the dash came back on but no crank when trying to start the truck
Submitted: 1 year ago.
Category: Chevy
Expert:  Mike S. replied 1 year ago.

can you at least hear the starter relay and/or starter solenoid click when turning the key to start?

Customer: replied 1 year ago.
No I cant
Customer: replied 1 year ago.
I hear a click but my be the relay
Expert:  Mike S. replied 1 year ago.

Ok, here is the wiring diagram.

Do you have someone to turn the key while you feel if it is the relay that is clicking?

Expert:  Mike S. replied 1 year ago.

If not, at least check those fuses.

Customer: replied 1 year ago.
I checked all the fuses all good except the eng 1 but it has a short withe I was trying to find so I try ed to go old school and yous a wire
Customer: replied 1 year ago.
No click ing
Expert:  Mike S. replied 1 year ago.

So the relay doesn't click? Backup and test those fuses for voltage. Simply looking isn't good enough, you must check for voltage.

Expert:  Mike S. replied 1 year ago.

And check both sides of each fuse. The Maxi fuse 6 should be hot on both sides all the time. The crank fuse should be hot on both sides when the key is on start. the if all, ok, remove the starter relay and check the terminals in the socket, one should be hot all the time, that is from that maxi fuse and then one additional hot when the key is on start, that is from that crank fuse. If all ok, replace the relay. If not anything from the crank fuse, replace the neutral switch or at least test for voltage in and out of it with the key on start. Although now a days they call them a range sensor and are on the transmission.

Customer: replied 1 year ago.
my test light doesn't work or no power to my relay .. just put a new tranny I'm and neutral safety switch and connectors could I have frI'd it try to over load the fuse
Expert:  Mike S. replied 1 year ago.

No power to which terminal of the relay? You were supposed to be testing 2.

Expert:  Mike S. replied 1 year ago.

I going to bed now, I'll check in on you tomorrow morning about 10am or so.

Customer: replied 1 year ago.
2 on one side is hot
Customer: replied 1 year ago.
Of the starter relay
Customer: replied 1 year ago.
K
Expert:  Mike S. replied 1 year ago.

Replace the starter relay.

Customer: replied 1 year ago.
Replace it no go took the old one apart pinchrd it together and it started test lighted the ignition switch and have power everything still no crank
Customer: replied 1 year ago.
When turning the key
Expert:  Mike S. replied 1 year ago.

Ok we are going to have to communicate better so we understand eachother.

Remove the starter relay and check the terminals in the socket, one should be hot all the time, that is from that maxi fuse and then one additional hot when the key is on start, that is from that crank fuse.

Let me know the results of these 2 tests. I know you probably already told me but tell me in a different way so I don't get confused.

Customer: replied 1 year ago.
The 2 are hot on the relay and the 3rd is when key is on crank fuse is good and hot were it plugs in
Expert:  Mike S. replied 1 year ago.

No, stop. You are confusing me. Only answer the questions I asked. Then if I need to ask more I will.

I'm sorry to be blunt but this is going on for too long with misunderstanding.

Now, you are not suppose to be testing the relay, but the relay socket.

Forget about the fuse right now. Unless you are able to test the relay while it's in the socket but if that is how you are testing you have to let me know cause I am expecting the relay to be out.

Customer: replied 1 year ago.
Put a new relay in and and it didn't work
Expert:  Mike S. replied 1 year ago.

Ok, but that isn't what I asked.

Customer: replied 1 year ago.
Sock it is hot
Expert:  Mike S. replied 1 year ago.

what?

Customer: replied 1 year ago.
All three points work on the relay where plugs in
Expert:  Mike S. replied 1 year ago.

Are you testing with the relay in the socket or out?

Customer: replied 1 year ago.
Out
Expert:  Mike S. replied 1 year ago.

I am starting to understand now. I think you may have to check the wire at the starter solenoid now when the key is on start, the purple wire.

Expert:  Mike S. replied 1 year ago.

Out? No, that's wrong. First of all, only 2 should be hot.

Expert:  Mike S. replied 1 year ago.

Plus, when you are testing do you have the key off, key on run or key on start?

Customer: replied 1 year ago.
Try ed all 3
Expert:  Mike S. replied 1 year ago.

So you are telling me with the starter relay out of it's socket, the socket has power to 3 different spots with the key off, key on run and key on start?

If yes, something is really truly messed up here. First of all, only 1 spot should be hot with the key off, then a second spot will only be hot when the key is turned to start and at no time should 3 spots be hot.

Customer: replied 1 year ago.
2 are hot with the key off
Expert:  Mike S. replied 1 year ago.

That just isn't correct. You are going to have to determine which it is to begin with that don't belong.

Customer: replied 1 year ago.
How do I do that
Expert:  Mike S. replied 1 year ago.

I might know a way to narrow that down. remove that Maxi fuse #6 and see which goes dead.

Customer: replied 1 year ago.
Maxi fuse 6? Location?
Expert:  Mike S. replied 1 year ago.

in the underhood fuse/relay center.

Customer: replied 1 year ago.
There isn't one
Expert:  Mike S. replied 1 year ago.

There isn't one what?

Customer: replied 1 year ago.
What's the name of the fuse nothing says maxi on the fuse diagram
Expert:  Mike S. replied 1 year ago.

I will look it up.

Expert:  Mike S. replied 1 year ago.

I don't have that info. Isn't there a fuse #6, a 40a?

Customer: replied 1 year ago.
The only 40amp is ign a pulled it and no difference
Expert:  Mike S. replied 1 year ago.

Wait, I see it's the same as the IGN A.

Expert:  Mike S. replied 1 year ago.

Here is a list of those underhood fuses,

Expert:  Mike S. replied 1 year ago.

No differenece? both still hot?

Customer: replied 1 year ago.
No difference when I pulled it and tested with key off
Customer: replied 1 year ago.
Both hot
Expert:  Mike S. replied 1 year ago.

Do you still have jumper wires hooked up?

Expert:  Mike S. replied 1 year ago.

Nothing in the starter relay socket should be hot with that IGN A fuse removed.

Customer: replied 1 year ago.
Ya I know it makes no sense
Customer: replied 1 year ago.
What else could make it hot
Expert:  Mike S. replied 1 year ago.

Do you still have jumper wires hooked up?

Expert:  Mike S. replied 1 year ago.

You started off this post saying "Ran a wire instead of a fuse at the eng 1 plug" What did you mean by that? What were you running a wire to and why? Is this wire still hooked up?

Customer: replied 1 year ago.
I had a short and kept blowing eng
1 fuse as doon as i turend the key so I put a wire in each end of the fuse ports so I could find it(bad idea) but turn the key and blew ing a fuse
Customer: replied 1 year ago.
No its not there anymore
Expert:  Mike S. replied 1 year ago.

Is this your vehicle or a customers?

Customer: replied 1 year ago.
Mine
Expert:  Mike S. replied 1 year ago.

I don't know what else to tell you except you are going to have to find out why that starter relay has voltage to it when it is not supposed to. I would assume you may have to just unbolt the fuse box and pull it out and look behind it or whatever and find out what is going on, such as if there is a shorted wire, a wire hooked up to something it isn't supposed to be hooked up to or what.

You have the wiring diagram, it should work like what the diagram shows. Anything else from that is wrong.

Customer: replied 1 year ago.
Done that I have a breathalyzer hooked up to the truck could that be it
Expert:  Mike S. replied 1 year ago.

Unhook everything that is addon then retest.

Customer: replied 1 year ago.
All get back to u have to get smart start to un hook it all not open tell Monday
Expert:  Mike S. replied 1 year ago.

ok