C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Code # 36 on 1986 HELP !!!

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Old Jul 10, 2005 | 12:18 PM
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Default Code # 36 on 1986 HELP !!!

** See the bottom message I left as to what connector goes to which relay as mine were both laying behind the battery and I don't know which is the burn off relay **



I found that my code problem is a 36 and that shows to be the MAF burn off relay or the power relay. I am pretty sure the burn off is under the ECM, but not sure and the power relay I belive is on the firewall, but not sure. Is there a chance that the MAF could be the problem, I believe the code for the MAF is code 34. Any HELP will sure be appreciated. By the way I have the alum. head vert if that makes any difference. Thanks !!!

Last edited by 1986vert; Jul 12, 2005 at 12:15 AM. Reason: Which connector is the burn off relay ????
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Old Jul 10, 2005 | 12:36 PM
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Both the burn off and power relays are on the firewall behind the battery, on my '88. The burn off relay is the one farthest from the side panel.

It is quite unlikely that this relay is ok and the MAF is faulty.
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Old Jul 10, 2005 | 01:45 PM
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That's were it is on my 1988, but it doesn't appear to be on the 86, and it doesn't show where it is in the GM manual, or I am missing finding the right diagram. Anyone with a 1986 know for sure ??? Thanks
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Old Jul 10, 2005 | 02:14 PM
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Both relays are behind the battery
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Old Jul 10, 2005 | 02:19 PM
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.......and the burn-off relay is the inboard one, the outboard one is the MAF sensor power relay....
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Old Jul 10, 2005 | 03:50 PM
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Something I learned from Gorden K

Replace both relays at the same time. Otherwise you will likely experience another relay failure in the not so distant future

seeya
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Old Jul 10, 2005 | 10:44 PM
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Thanks guys I found them, I called Autozone and they never heard of them, is this a part I need to get from GM or ???? I would rather get it at a local part store if possible, any ideas ???
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Old Jul 10, 2005 | 11:27 PM
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I think it's the same as the cooling fan relays so you may find a listing there. Not a 100% though
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Old Jul 10, 2005 | 11:43 PM
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I replaced both on my 86. They are both behind the battery on the firewall. You will either have to get them from GM or a Corvette parts supplier.
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Old Jul 10, 2005 | 11:55 PM
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I know for a fact that Advance auto has them... $17 each.
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Old Jul 11, 2005 | 07:45 AM
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I just bought the MAF relay from AZ for $11.99 yesterday. They didn't have the burn off relay in their computer, but it is the same one.
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Old Jul 12, 2005 | 12:13 AM
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Default Which relay is it ?????

Can anyone tell me the color of the wires on the connector for the inboard burn off relay or what number on the connector doesn't have a wire to it ??? Mine were both off the firewal and laying behing the battery and I want to make sure the right connector goes on the correct relay. Thanks.
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Old Jul 12, 2005 | 08:22 AM
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Originally Posted by 1986vert
Can anyone tell me the color of the wires on the connector for the inboard burn off relay or what number on the connector doesn't have a wire to it ??? Mine were both off the firewal and laying behing the battery and I want to make sure the right connector goes on the correct relay. Thanks.
http://members.shaw.ca/agent86/Mass%...w%20Sensor.pdf
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Old Jul 12, 2005 | 11:17 AM
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The 86 has two relays that use different connectors. Note the different connector colors. The 87 uses two identical relays and the 85 uses a single relay. I can't speak for the 88 or 89. The pic should be helpful to locate the mounting and relay position.

Remember to reset the system (disconnect battery) This to ensure the code is a hard code.

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Last edited by JrRifleCoach; Jul 12, 2005 at 11:23 AM.
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Old Jul 12, 2005 | 05:04 PM
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That is interesting as my connectors are both black, but I have a vert which might be different. Is there another way to distinguish between the 2 ???
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Old Jul 12, 2005 | 08:32 PM
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Originally Posted by 1986vert
That is interesting as my connectors are both black, but I have a vert which might be different. Is there another way to distinguish between the 2 ???
Did you look at the wiring schematic i uploaded for you ??
2 posts ago
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Old Jul 12, 2005 | 09:11 PM
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Yes I have, but haven't had a chance to look at the car yet and see what matches up. I am hoping that will give me the answer. I will take a look when it cools down outside as we are on a record setting day for being hot and it is reaching its peak right about now. Thanks and I will have the new relays tomorrow from GM and I sure hope that they solve the problem as I don't know where to go from there if it doesn't, so I think positive !!!!
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Old Jul 13, 2005 | 01:09 AM
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Be sure and check that the insulation is in good condition at the connectors. The high current loads on that year tends to shrink the insulation leaving bare copper exposed. My 86 had about 1/2 to 3/4 inch exposed.
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Old Jul 13, 2005 | 03:12 PM
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Thanks for the tip on the bare wires as I checked and one was bare about 1 inch and another was just about worn through and had to be replaced. I never would have thought of that. I still haven't figured out for sure which connector is that maf relay and which is the burn off. but I am pretty sure the one with the red wire is the actual relay.
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