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1987 Fleetwood Brougham
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239 Posts
OBD 1 can be diagnosed with a paperclip. I think you short pins 5 and 12, but I could be wrong, and then just count the number of check engine light flashes. Those $35 scan tools literally do the same thing as the paper clip. Do a google search, you'll get the correct pins to short.
 

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93 & 96 Fleetwood
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115 Posts
Discussion Starter · #3 ·
I have a key for running the diagnostic. I know the codes my car is throwing out. I was looking for something that can run tests and give more detailed info and turn off engine lights. It'll also let me know if my emissions are off and if I will pass inspection. I found the OBD ll and OBD 1 for sale for a little over $300.
 

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1987 Fleetwood Brougham
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239 Posts
I know on the Fords you can do a full diagnostic on the car via the OBD I port and a scan tool, and I know on OBD II vehicles you can do all sorts of things, but I didn't think the GM OBD I setup was that advanced. I could be dead wrong though.
 

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94 FWB, 93 SDV, 94 FWB (sold), 90 Brougham (sold)
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3,710 Posts
You can do a whole lot with a scan tool or a laptop and a connector. They sell the ALDL connector for OBD1 vehicles that can plug into a laptop. There are programs like Winaldl that can display all the information you could ever want about your engine.

http://winaldl.joby.se/

Scroll down and take a look at the screenshots and whatnot.

http://www.aldlcable.com/

An even better site!

Brian
 

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93 & 96 Fleetwood
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115 Posts
Discussion Starter · #11 ·
brougham said:
Get a service manual It'll say how to get the codes and what they all mean. They also have charts so that you can figure out what's wrong.
I have the $100, 3000 page service manual and those books aren't as helpful as you would think.
 

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94 FWB, 93 SDV, 94 FWB (sold), 90 Brougham (sold)
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The book has been a burden to learn how to use, but the emissions / driveability section have more than paid off for the cost I paid for my service manual, all $14 of it from ebay. Now if I could just find a POS laptop to use!

Brian
 

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1991 Cadillac Brougham D'Elegance 5.7 Litre, 1994 DeVille
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6,756 Posts
fltwd93 said:
I have the $100, 3000 page service manual and those books aren't as helpful as you would think.
If that's not going to help you a scan tool probably isn't going to be much help either. It's not going to tell you anything more then the manual does.
 

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93 & 96 Fleetwood
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115 Posts
Discussion Starter · #16 ·
brougham said:
If that's not going to help you a scan tool probably isn't going to be much help either. It's not going to tell you anything more then the manual does.
I decided not to buy the scanner. I've been able to solve all my problems w/o one so far..........I just thought it might make the process quicker.
 
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