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In the final stages of removing multiple layers of Bubbafied wiring. In the pic- I have an orange wire (to the right of battery cable end in the pic) that was cut and is dangling loose (only one). I have a 20 amp Fusible link (center) that was also cut and is dangling loose. The fusible link has remnants of orange wire insulation on the cut end. I can possibly gnaw enough off the link to solder to it and reattach it to the orange wire, but I don't know what this fusible link is for or if it even goes to the cut orange wire. I also don't know what was plugged into the connector on the left of the pic. Any ideas?
So that diagram only shows 1 fusible link. The orange wire is the 12v feed to the ECM, fuel pump relay, oil pressure switch, MAF power sensor relay and the MAF sensor burn-off relay. I don't see how your car could even start w/o it connected.
The other side of the fusible link has a red wire that goes to the fan control relay.
I don't see a butt soldered joint strong enough here. Last I looked most part stores have them on the shelf. Yes you have to use butt crimp splices unless you can find just that part of the engine harness. Dr. Rebuild? Electric Limited?
Thanks for the response. The wiring diagrams can't be used to solve this problem. That's why it makes no sense RE the car starting etc. There is a heavy duty (OEM) + wire going from the battery terminal directly to a distribution post where there are 7 fusible links attached, all of which are in spiral wrap. One of these is the one you are referring to that runs the items you listed. The fusible link I am referring to in the picture is attached directly to the Battery + terminal connector, on the battery. This one is separate from all the rest, and is not on the distribution post. The orange wire in question is in a different spiral wrap, not associated with the 7 fusible links on the distribution post. Common sense dictates that the cut fusible link with orange wire remnants was originally attached to the cut orange wire. HOWEVER: The were so many bogus wires added to this car that I can't help but wonder how many wires were removed and thrown in the trash. I can't just hook it up temp to test, the engine is all apart. I just need someone to look at their 87 and see if the fusible link on the + cable goes to an orange wire in a loom.
How many cooling fans do you have. If 1 there would be a single fusible link from the + cable (NOT THE JUMP BOX) and if 2 there would 2, 1 each in the circuit to each cooling fan relay. Check the cooling fan(s) wiring. See 8A-31 and 8A-10
I would think maybe the + cable was replaced at some point. Someone can check an OE 87 but I believe it might likely have had either 2 pigtails (ECM & FAN) or 3 pigtails (ECM, FAN and AUX FAN)
See the image at 8A-201-1 - it's not great but if you're in there I believe you'll understand.
NOT OE but an early ACD replacement SPO cable would have been similar/same as this:
How many cooling fans do you have. If 1 there would be a single fusible link from the + cable (NOT THE JUMP BOX) and if 2 there would 2, 1 each in the circuit to each cooling fan relay. Check the cooling fan(s) wiring. See 8A-31 and 8A-10
I would think maybe the + cable was replaced at some point. Someone can check an OE 87 but I believe it might likely have had either 2 pigtails (ECM & FAN) or 3 pigtails (ECM, FAN and AUX FAN)
See the image at 8A-201-1 - it's not great but if you're in there I believe you'll understand.
NOT OE but an early ACD replacement SPO cable would have been similar/same as this:
I only have 1 Fan. So..... it would be 8A-31-0. It's clear that the Relay-to-Fan is Black/Red, and the supply wire from the fusible link to the relay is Red (which mine is). The fusible link in question must not be fan related since it's "load" side wire was orange. My cable is different than that cable. Can't read the first number x2055603. It has the lead to the distribution post, one 20A fusible link, and one heavy duty female single wire connector. I suppose it could have been replaced. I'll pull off all the fusible links from the dist post to see which one might go to the fan relay.
Update: The red +12V supply wire to the relay connector is dead, supposed to be constant 12V. None of the fusible links from the distribution post go to the connector. There is a female single pin connector sticking out of the same wire loom right next to the point where the 4 fan relay connector wires exit the loom. Just for grins, I did a continuity test between this female single pin connector and the +12V pin (red wire) on the relay connector. It's the same wire. So my guess is that this single pin connector (red wire) was once connected to the battery through a fusible link with (2) male single pin connectors. One male connector went to the wire sticking out of the wire loom near the 4 pin relay connector, the other male connector going to the existing (currently unused) female connector near the battery cable end (currently unused). If I pick up a (20A?) fusible link and (2) male single connectors and make up this jumper, the fan circuit should now be complete as it was OEM. Can anybody with a 87 and only one coolant fan verify this?
GM# 12055602 not 12055603 would have been an OE original # and would have been the same for '86 and '87. Someone with a known OE '86 or '87 should be able to help you.
I found a spot on the wire where the number is clear.... it's the 12055603 number, FWIW. I looked for a 20A fusible link and all I found at the auto parts stores was junk. I made up a jumper with (2) male single pin connectors and an inline (replaceable) fuse holder. I replaced the missing fan relay with a NAPA one and connected it all back up stock using the jumper. Then I gnawed away at the OEM cut off fusible link and re-united (soldered) it with the random cut off orange wire via another inline fuse holder. No fuse yet there until I figure out what the orange wire goes to. The car is now back to the stock wiring configuration and all of the spaghetti wiring has been removed.
I found a spot on the wire where the number is clear.... it's the 12055603 number, FWIW.
I've seen production/casting/stamping identification of parts being a "digit" different than the SPO service part but I had never noticed it on wiring components(cables/harnesses).
Sounds as if you've got the fan control "under control" so you're all set.
87 Fan Wiring- need help
