Okay.
I've had no end of trouble with
1. loop wires, and
2. fusible links and
3. diodes
with my Japanese cars. Ford was doing the exactly the same stuff in the CFi to Port EFi area. It had to.
The onboard systems worked because these three structures existed to change the operation of control systems. So when you go through 1983 to 1990 EFi Fords, you have to take a step back and think about what it would be like if you were Ford, having to put all this new wine stuff into old wineskins. Ford deserve an award for how they solved very big problems with wiring protocols, and 1. loop wires, and 2. fusible links and 3. diodes was how they did it.
I run my 12 volt accessory junctions for recharging Smart Phones, tablets, and running 55 amp road survey lights, and the Japanese put fusible links in everything. Just to make it safe, but it also gets you horribly messed up when you have to back track and re-establish the stock system when its no longer working due to age and current.
Ford and Toyo Kogyo do this, so do some Japanese cars at the acessory level. Power drains then become a strange diagnostic problem
A standard wiring protocol for all cable runners in buildings or in automative cables, is to be able to change a whole wiring system at one end by using a loop wire.
This gets complicated when Ford or the techncial people who help us have the ablity to say "the wiring harnesses never changed". By adding a fusible link or loop wire at one end, a whole wiring loom effectively COMPLETELY changes.
Ford did other changes with wiper dwell stalks and some other stuff for 1983 to 1986 model year stuff, so you have to take some time out to find what Ford did to help you avoid some blank alley time when rewiring a carb to 5.0 EFI SD or MAF vehicle. The four types of O2 sensor systems varaious kinds of EFi Foxes and SN95 Fox 4's used are important.
When a part oxidises, loop wires become better methods to change a whole wiring schematic "without changing the the wiring".
The problem is they then become like a "fusible link"
loop wire 0:23/4:02
This was a means of Ford keeping the whole variants of the O2 sensor types used the same, but the loop wire effectively undid a certain kind of MAF, non SD circuit.
It looks very similar to the fusile link, but what is used is a gender variable O2 sensors used in the 1987 to 1993 Foxes. In this instance, Ford was adding OBDII stuff to the EECIV, and AOD, 5 speed, a MAF 87-93 would have the Speed Density protocols jumpered by loop wire. In 1991, the IAC and 02 sensors had PID details in some EECIV for real time data logging, and in 1990, Ford then had some major issues about how to deal with the IAC diode every CFi equiped 3.8 or SD 5.0 SEFi (ONLY CFi 3.8, and SD 5.0 SEFi, not the 5.0 HO, which didn't have an IAC !).
This is what makes Fords a little more confusing, because the rocket science allows major changes to function by minor changes at the wring junctions.
Originally Posted by Neomustangs Published on Dec 11, 2014
Now see http://vb.foureyedpride.com/showthre...y-not-charging
and http://vb.foureyedpride.com/showthre...5-fusible-link
See https://www.youtube.com/watch?v=-SpsSRGfDQI
http://vb.foureyedpride.com/showthre...-fusible-links
http://vb.foureyedpride.com/showthre...SOLVED!!/page2
[QUOTE=erockk;1817481]it wired into the connector coming off of the idle air controller.
mine was in the wiring harness (not my engine but the best picture i could find)
Connect With Us