Hey guys, im rebuilding my battery harness here.

Im starting the process of rebuilding my wiring harnesses here and the negative terminal has a grounding point about halfway down that bolts to the chassis.

Is this grounding terminal something i can replace with a generic part? If not, how would we replace the negative terminal here and retain the stock grounding location?

Heres a picture of that terminal.

 

yep, instead of one cable, you need two. one from the starter to this ground, and the second from that ground to the battery

 

@j9fd3s weird i see that you responded but im not seeing it in the thread.

So basically im daisy chaining one cable from the starter to the ground point here, then bolting the second cable from that ground point to the negative terminal.

 

It seems like you can find close enough approximations by searching "flag ring terminal"




For the insanely dedicated, that terminal doesn't look too difficult to hand fabricate out of a bit of flat brass stock, maybe about .090" thick lol

 

@pzr2 thanks for your input.

yknow, it was actually your thread about the rebuilding the wiring harnesses thats started me on this journey. and oooo man, what a rabbit hole this is

 

I'm like 1.5 years deep into the harness replacement job, and I'm still in the planning / parts-gathering phase. Granted I am trying to get everything done at once to minimize downtime, but still.

Thankfully pzr2 and JerryLH3 have already done a lot of the information-gathering work for us.

Also, you might find this info useful: https://www.rbracing-rsr.com/wiring_ecu.html

That page has a ton of information, although it does cause me some analysis paralysis. Whenever I think my planned harness is good enough, there's always one more thing I see at that page that I wonder about adding. Printable heat-shrink, epoxy sealed boots for the connectors, concentric twist, service loops...

 

Damn thats another page to try and digest.

Ive just been in my garage looking for connectors on my laptop while at the same time removing 30 year old harness tape.

 

@pzr2 @JerryLH3 do you guys know of this connector and spade terminal? its for the S4 Oil Level sensor. ive been digging corsa and ballenger but cant find anything similar.

 

Man I should get that reference website finished. I posted about this in another thread awhile ago but for the 1st gens.

That style of connector is referred to as a nailhead style terminal. I'm sure the OEM is Yazaki/AMP or something but I have an old Delphi (they are now called Aptiv) catalog that shows P/N 12015306 works for the housing + an appropriate Packard 56 series female terminal (for 20AWG wire, both 12124512 & 12124513 work). It's light gray as opposed to the natural plastic in Mazda harnesses, but I haven't been able to find an equivalent with another manufacturer yet. Mouser still shows stock of it.

 

BTW I think you might have the oil pressure sender and oil level sensors mixed up




Oil level sensor connector is Yazaki 090 family IIRC, got it written down somewhere...

 

@pzr2 thank you for that and yes i did get them switched, my bad.

and let me know if you need any help with that website and if i can contribute in any way. i know you had a thread about the S5 harness and @JerryLH3 had an S4 harness but his seems to be the 88 year which for some strange reason differs from the earlier 86-87 S4 harness. im rebuilding my S4 harness from my 87 FC and i think i have most of the connectors

 

good post im in the middle of just replacing the whole engine room harness and not stop from Driver side fender. Japan is selling your harness on ebay just provide vin
https://www.ebay.com/itm/35438253110...3ABFBMoO_6i5Rl

 

ive seen that ebay listing but that looks to be for the 89-91 harness. i have an 87

 

The Mazda p/n F061-67-070E for that harness is for RHD RX7. I am wondering if there would be any differences between that harness for RHD and LHD cars?.

 

they might have a series 4 harness just provide VIn they might have it

 

the seller said its fine cause it only for a turbo....

im gonna have to buy a harness anyways when repairing an exisiting harness. cant use any other wires

 

What do you mean its fine?

Whats fine?

 

He saying it's compatible for 89 -91 turbo