I think i asked this question nearly a decade ago,,, i cant remember the answer......
page 42- 3.8L start / IGN = near C403 there is a circuit ID #16 which is red/lt green. what purpose does this wire serve? page 43- 5.0L start / IGN = circuit ID #16 red/light green, what purpose does fuse link "P" serve?
in both instances what i am trying to understand is.... you have a jumper "wire" bypassing another "wire".??????
i bought one of those "heat powered" stove fans you simply set atop your wood stove,, the heat off the stove causes an isolated electronics part to generate power because of it. i know ,,, sounds like magic stuff in a bottle but read on,,, these things are real and im sure someone here will be getting a few for christmas.
inside of one use , i burned it up so i went on an exploration mission to determine what i had done wrong.
i had to learn about a product i had no knowledge of its existence.
the gizmo that converts heat into electricity is something call a Peltier effect. this tech is not that old and still kinda in its trial and error stages of engineering applications although you find them randomly on some high end cooling and de-humidification systems.
there are two types... TEC- thermal electric cooler
TEG- thermal electric generator
the TEC has a lower withstand point in deg F than a TEG.
they both actually do a somewhat similar job but are designed a smidge differently,, yet each has its own application. the tec has a lower output voltage as well so in my mind started to arrive at basic conclusions.
Come to find out the stove fan came equipped from the maker "Voda" with a TEC.
I took the bugger apart to understand what kind of electric motor drives the fan blade and discovered its a brush motor and it seemed to be ok with a 9v battery source, i did not put 12v on it figuring i was pressing my luck being i knew this motor design was never expecting to see any voltage higher than 5vdc when the TEC or TEG was on max.
Back pedal here a tad.. the TEC is 1/8'' thick by 1.5'' x 1.5'' device with a red and black wire hanging off it.
I researched out where i could find TEG's and there are mil-spec opitions, industrial options, then there are hobby options so i shot out an order to china for some cheapy renditions to tinker with... got a dozen of them on ebay for under 2$ ea.
I tossed out my defective one then installed 2 TEG in series thinking i would double my voltage potential which the results yielded a great operating fan.
these are very interesting units because all you have to do is have one side get warm while the other side stays at a different or ideally "lower temp by way of a mounted heat sync... if you do this the two wires will put out voltage and current proportional with the temperature difference the unit is experiencing. ~~ cool stuff eh???
here is a vid i did real quick......... i mispoke in the vid,, i think the TEG can go well over 200degF
this is a minerva tropic master 8 tube radio. i wanted a meter to give me a visual indication that i was exactly on a station so this was my solution. i used only the needle/pointer system out of a cheapy 9$ analog meter.
links here to vids of my testing out the theory and a final vid showing it in use.
EASTERN CATALYTIC 30243 (combo "Y" pipe and catalytic together **eliminates both "pre-cats" !!! good ! ** this part requires minor BFH mod to clear your transmission cross member. A few bashes after you gut it and its all good. **this part has excessively thick flanges, they are so thick that they barely accommodate your existing manifold stud length. **i had to run my bandsaw laterally on the passanger side flange to finally be able to install the two nuts, basically making them a tad "thinner". (normally) larger flanges are a good thing but not in this case. **this cat very easy to gut **header "Bell" shape matched perfect. **cat to intermediate mating are "BALL/Bell" and match perfect,, no gasket req'd. darn near a perfect match with small minor mods.
WALKER 43907 Pipe, intermediate **does not come with a flange,, so get one or reuse your old if you want. **the shape sorta "dips" "down" a tad lower than i like, you could manually tune it up a tad in he area of the longest radial. overall perfect match
EVTM 1987 bird/coug Page 60 showing the last section of the EEC pin outs.... the 88evtm may be the same.
I have been working on a resto and finally made it past start up day with my chip and a basic tune to get it running.
i wanted to make time to verify voltage at my TPS green wire KOEO and set up to do that.
i grab the connector and notice the chassis side harness (from the Computer), the color code of the wiring was not matching my blk/org/grn color coding of the tps. i dd a double take and started to worry.
I was forced to extract the computer and go to the two pins i can account for and verify continuity which were 47 and 26. for the designated blk/wht, i toned out and found no issue other than color..
so... for my tps it goes like this
wht/rd ends up becoming my Blk/wht wire somewhere
Gray/wht ends up becoming Dk G / Lt G at pin 47 of the eec Brn / wht ends up becoming Org/wht at pin 26 of the eec.
Has anyone noticed this issue around the EGR/TPS/Map sensor circuit?
This EEC harness came from an 87 5.0L cougar out of a junk yard up in pa that replaced my former CFI 3.8L EEC harness. I had no reason to question it other than inspect it as best as possible before installing. I did not notice this TPS wire color issue then.
this EEC harness has nothing to do with the fuse box harness grafting work i did to upgrade it as well to a 5.0L application.
I really need opinions.
I am testing for the presence of 5v and less than a volt on the TPS center tap in in a few.
the first pic is the MAP sensor connector.
the second pic is the EGR (left ) and TPS (right) connectors.
I think two things................... this was an assembly line screw up that was "made to work" or Ford had a short fall on certain color wires during that day and used what they had. at the end of the day,, if it has continuity to where it belongs,, it will work, i just need to document it in my son's EVTM.