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  #1  
Old February 10th, 2019, 13:17
greenramp greenramp is offline
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No bus

I have a no bus, no start issue. I have searched the internet watched the videos and searched here in . Pulled the speedo cluster first, no dice. Then checked ohms on the CPS. They seemed good but I bought a genuine part anyway just to have a spare. Cleaned all the connections on the computer still nothing. Tried checking for the 5 volts on various places but I have no clue what I'm doing. Any advice would be appreciated.
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  #2  
Old February 10th, 2019, 13:39
greenramp greenramp is offline
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Re: No bus

Sorry 2001 Jeep Cherokee sport 4.0
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  #3  
Old February 10th, 2019, 14:41
Criver12 Criver12 is offline
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Re: No bus

If it's the same as my 99' there is a ground connection under the center console where the parking brake bracket is. I remember disconnecting that and getting a no bus error. Reconnecting it fixed it.
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  #4  
Old February 10th, 2019, 14:43
greenramp greenramp is offline
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Re: No bus

Quote:
Originally Posted by Criver12 View Post
If it's the same as my 99' there is a ground connection under the center console where the parking brake bracket is. I remember disconnecting that and getting a no bus error. Reconnecting it fixed it.
I'll try that
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  #5  
Old February 11th, 2019, 05:42
sailorjim86 sailorjim86 is offline
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Re: No bus

Did you also check the ground cable that goes from the block to the chassis at the firewall? It goes from a #6 cylinder head bolt to the firewall on the driver side. From the factory it is just a cheap piece of strap that gets all cruddy over time. I replace mine with a piece of battery cable (after cleaning everything up). That ground can cause all kinds of strange issues. Worth a look if the one under the center console doesn't solve.
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  #6  
Old February 11th, 2019, 05:56
greenramp greenramp is offline
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Re: No bus

Sailorjim86 I did look at at and it still looks normal with no extreme corrosion but for such a simple fix is probably worth an upgrade
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  #7  
Old February 12th, 2019, 10:01
greenramp greenramp is offline
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Re: No bus

-SOLVED-
went back through everything, with 5v volts everywhere. took the ground off where the battery NEG goes to the body and wired wheeled it to metal for better connection. Did the same for the engine to firewall and BAM no bus is gone. Runs, drives and is now looking at other ways to piss me off. Only advise I can give future "no bussers" is just because its clean and tight don't take for granted that it is making connection. now I'll upgrade that strap.
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  #8  
Old February 12th, 2019, 10:02
greenramp greenramp is offline
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Re: No bus

Thanks for all that gave advice.
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  #9  
Old February 12th, 2019, 16:13
sailorjim86 sailorjim86 is offline
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Re: No bus

Glad you got it! It's what's underneath that ground connection on these old girls that often matters.
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