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  #21  
Old May 24th, 2014, 05:57 PM
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Jason England
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Originally Posted by worsethenu View Post
I assume that rollever switch mean interia shutoff? if so, I dont think the rollover switch was on the '94? If it is i haven't been able to find one and atlantic british doesnt list one for sale (used this as a double check). ------ Follow up post added May 24th, 2014 04:13 PM ------ The truck lives outside so it's very possible rain got in there.
Truck did have an inertia switch. There are 2 types. You can read about them in the docs I linked.

Easiest way to test the ECU is in the truck with a rover gauge. It's free software but needs an adaptor cable. I could lend you one ... I'm in the middle of moving so it's a bit tricky. Maybe someone else will offer.
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  #22  
Old May 24th, 2014, 05:57 PM
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Originally Posted by worsethenu View Post
is there any way to test the computer itself if i pull it?
Not really .. Only thing is if it's full of water ... You'd be able to test that.
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #23  
Old May 25th, 2014, 01:03 AM
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He has got a 94. With AC they sit where they pool water in them.
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  #24  
Old May 26th, 2014, 02:50 AM
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Mike Coleman
94 D90 ST/95 D90 SW/83 110
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Have you checked the chicklet? Check out these threads for more info:

http://www.defendersource.com/forum/...ad.php?t=41193

http://www.defendersource.com/forum/...ad.php?t=44883

I had this same issue with my 94 over a year ago. The starter would crank, I had spark, and the fuel pump was working. Turns out if this little resistor goes bad, your ECU has no idea you're trying to start the truck, and as a result, it won't turn on the injectors.

It's something cheap to look into, and maybe it's the problem.

Cheers,

Mike
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  #25  
Old May 26th, 2014, 10:39 AM
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Originally Posted by mcoleman762 View Post
Have you checked the chicklet? Check out these threads for more info: http://www.defendersource.com/forum/...ad.php?t=41193 http://www.defendersource.com/forum/...ad.php?t=44883 I had this same issue with my 94 over a year ago. The starter would crank, I had spark, and the fuel pump was working. Turns out if this little resistor goes bad, your ECU has no idea you're trying to start the truck, and as a result, it won't turn on the injectors. It's something cheap to look into, and maybe it's the problem. Cheers, Mike
And this is exactly what to do ...

you need to check you are getting around 9.5volts on pin 39 of the ECU ... that will confirm the signal is actually making it from the coil to the ECU
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #26  
Old May 26th, 2014, 12:00 PM
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Okay, just ran the test as follows. I am not great at electrics so please tell me if i did it wrong:

Black MM wire in pin 40
Red MM wire in 39
Turned the key and got 0.

I found the resistor but I'm not sure the best way to test it without removing it.
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  #27  
Old May 26th, 2014, 12:09 PM
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Pretty sure you can just jump it and see if it starts. When they fail they corrode in my experience and it is obvious.
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  #28  
Old May 26th, 2014, 12:15 PM
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After reading about the 14cux i think the resistor is used to send the correct voltage to the ecu to tell it which map to use, but i defer to ppl who know more than I do. I'm not sure jumping it is a good idea
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  #29  
Old May 26th, 2014, 12:48 PM
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Quote:
Originally Posted by worsethenu View Post
After reading about the 14cux i think the resistor is used to send the correct voltage to the ecu to tell it which map to use, but i defer to ppl who know more than I do. I'm not sure jumping it is a good idea
Humm. Not sure. I would try to find a replacement first.
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  #30  
Old May 26th, 2014, 01:38 PM
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Originally Posted by evilfij View Post
Humm. Not sure. I would try to find a replacement first.
Find a replacement. Radio shack is your friend!
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #31  
Old May 27th, 2014, 04:28 PM
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I soldered in a new resistor and tested it and got 6.68 ohms. Tried to start the truck again and it still won't start. I put the multimeter back on pins 39 and 40 and got .83 volts this time instead of 0? What??? Here are some pics of the resistor and volt meter. Did I set the volt meter wrong?
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  #32  
Old May 27th, 2014, 04:57 PM
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Quote:
Originally Posted by worsethenu View Post
I soldered in a new resistor and tested it and got 6.68 ohms. Tried to start the truck again and it still won't start. I put the multimeter back on pins 39 and 40 and got .83 volts this time instead of 0? What??? Here are some pics of the resistor and volt meter. Did I set the volt meter wrong?
What are the color codes on the resistor. I'm wondering if you got a 66.8 ohm one instead?
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #33  
Old May 27th, 2014, 08:33 PM
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It looks like gold, red, olive, and blue?
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  #34  
Old May 28th, 2014, 08:02 AM
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In which case it's correct. You need to start tracing back up the path .. what's the voltage at the coil where the white wire originates? If that's not correct you have to figure why etc
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #35  
Old May 30th, 2014, 04:35 PM
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Finally stopped raining. So I have 12.15v at the battery. Testing the coil it looks like each post only has 1.47v or less. Is this correct? Shouldn't it be within 1 v of the battery?
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  #36  
Old May 31st, 2014, 08:13 AM
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Originally Posted by worsethenu View Post
Finally stopped raining. So I have 12.15v at the battery. Testing the coil it looks like each post only has 1.47v or less. Is this correct? Shouldn't it be within 1 v of the battery?
The docs I linked have all the tests to diagnose this ...
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Soapy water / KY jelly, etc. is is basically a must. Yes, good idea to remove trim panels - only takes 5 more minutes to do so.
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  #37  
Old August 20th, 2014, 04:51 PM
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Joshua
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I think he gave up...

http://www.ebay.com/itm/1994-Land-Ro...ht_2609wt_1153
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I am talking purely from an aesthetics standpoint.
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