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Old 01-25-2010   #11
Jeffvette
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Default Re: 1989 ZR-1 Pilot #004 Thread

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Originally Posted by 1989ZR1#74 View Post
10. Dash information displays "Err" on Oil Pressure, Coolant Temp, Range, Instant MPG.

Might have a circuit board issue going on there. A connector undone.I've got an 85 halfway ripped apart if you want to borrow a known good cluster.
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Old 01-25-2010   #12
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Default Re: 1989 ZR-1 Pilot #004 Thread

I appreciate that. There is a lot of loose wires under the drivers side dash. I am not to worried.. (yet!) I won't get to that for awhile.
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Old 01-25-2010   #13
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Default Re: 1989 ZR-1 Pilot #004 Thread

Prototype Electronic Spark Control Module.

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Last edited by 1989ZR1#74; 01-26-2010 at 10:51 PM.
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Old 01-25-2010   #14
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Default Re: 1989 ZR-1 Pilot #004 Thread

More Electrical Checks:

1. Tail lights work
2. Brake lights work, including all bulbs in 3rd
3. Power locks, only drivers side works.
4. Oil pressure gauge now shows zero.

It Appears that the ignition switch cylinder is loose or not engaging the starter correctly. I don't want to try too much before we can properly prep the car for 1st start.
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Old 01-25-2010   #15
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Default Re: 1989 ZR-1 Pilot #004 Thread

Found this in the rear cargo box, under the plastic liner:



Had 8 AC FR1L (no S) Plugs in it.
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Old 01-25-2010   #16
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Default Re: 1989 ZR-1 Pilot #004 Thread

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Originally Posted by 1989ZR1#74 View Post
More Electrical Checks:

4. Oil pressure gauge now shows zero.

No surprise that sending unit should be right next to the oil filter. I have a special socket that you can borrow to use to remove it and the sending unit is available at checker and autozone.
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Old 01-25-2010   #17
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Default Re: 1989 ZR-1 Pilot #004 Thread

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No surprise that sending unit should be right next to the oil filter. I have a special socket that you can borrow to use to remove it and the sending unit is available at checker and autozone.
Not sure if it works or not yet. before it read zero it read Err. I'll let you know.
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Old 01-25-2010   #18
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Default Re: 1989 ZR-1 Pilot #004 Thread

This is cool!!

I have to wonder if the data on the serial line tot he dash is different from L98 to LT5... That would cause the Err if it was
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Old 01-25-2010   #19
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Default Re: 1989 ZR-1 Pilot #004 Thread

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This is cool!!

I have to wonder if the data on the serial line tot he dash is different from L98 to LT5... That would cause the Err if it was
Jeff, My bet is the data isn't present. The wiring under the dash is in disarray. It looks like someone who did not know what they were doing tried to fix either a VATS issu, a bad clutch engage wire, or bad ignition switch. So who know what I'll find when I get back there. Glad I have the 89 wiring diagram. Eric
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Old 01-25-2010   #20
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Default Re: 1989 ZR-1 Pilot #004 Thread

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Jeff, My bet is the data isn't present. The wiring under the dash is in disarray. It looks like someone who did not know what they were doing tried to fix either a VATS issu, a bad clutch engage wire, or bad ignition switch. So who know what I'll find when I get back there. Glad I have the 89 wiring diagram. Eric
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