Fredo Posted October 3, 2023 Share Posted October 3, 2023 So when I bought this 86' MJ with a 4.0l 5 spd had on Tachometer, I switch instrument cluster but TACH still not working, looking at the engine, I see the distributor is not the original, so, apparently this was changed thus it was not wire to the cluster (this is my conclusion) my question is, is there a wire diagram an one can share and/or, any one know how to connect it? Link to comment Share on other sites More sharing options...
Agreen Posted October 4, 2023 Share Posted October 4, 2023 https://comancheclub.com/topic/69073-86-tach-wiring/#comment-738143 The 86 didn't come with the 4.0 as an option. You either have a 4 CYLINDER 2.5 Liter engine, a 2.8 GM V6 (like the one that was in the S10), or a 2.1 diesel engine. Link to comment Share on other sites More sharing options...
Fredo Posted October 4, 2023 Author Share Posted October 4, 2023 On 10/4/2023 at 12:29 AM, Agreen said: https://comancheclub.com/topic/69073-86-tach-wiring/#comment-738143 The 86 didn't come with the 4.0 as an option. You either have a 4 CYLINDER 2.5 Liter engine, a 2.8 GM V6 (like the one that was in the S10), or a 2.1 diesel engine. Expand thanks, but if is not an 86 is an 84, but I know for a fact is a 4.0L.. is a 6 cylinder engine Link to comment Share on other sites More sharing options...
Agreen Posted October 4, 2023 Share Posted October 4, 2023 It's at least an 87, since it has the 4.0. You can disregard the earlier link. That is specific to the 86 comanche (and 84-86 cherokees). Link to comment Share on other sites More sharing options...
Fredo Posted October 4, 2023 Author Share Posted October 4, 2023 On 10/4/2023 at 10:30 AM, Agreen said: It's at least an 87, since it has the 4.0. You can disregard the earlier link. That is specific to the 86 comanche (and 84-86 cherokees). Expand thanks! Link to comment Share on other sites More sharing options...
eaglescout526 Posted October 4, 2023 Share Posted October 4, 2023 On 10/4/2023 at 3:37 AM, Fredo said: thanks, but if is not an 86 is an 84, but I know for a fact is a 4.0L.. is a 6 cylinder engine Expand On 10/4/2023 at 10:30 AM, Agreen said: It's at least an 87, since it has the 4.0. You can disregard the earlier link. That is specific to the 86 comanche (and 84-86 cherokees). Expand It is an 87, the hood rod is still in the 84-86 location which was still there on the 1986 produced 87 MJs. As for your tach issue, you will not find the tach signal on your distributor, you will find it on one of the plugs at the bottom of the ICM(Igniton Control Module) that has the coil mounted on top. The tach signal should be a green wire, someone will correct me if I am wrong about that. Link to comment Share on other sites More sharing options...
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