XR7-4.6’s disjointed build thread 2 Electric Boogaloo

[1997ThunderbirdLXV6]

Didn't I send you that battery tray...over a year ago?

Fun fact: my roommate's Cadillac ATS comes stock with the battery in the trunk. One time, he disconnected it to clear a code which my app refused to clear for some reason; and then he closed the trunk! And there's no way in without power; base ATS without folding seats. We had to use jumper cables on the terminals under the hood just to open the trunk.

It's great that you could repurpose that firewall passage. I had the same luck: the original owner had a cable-operated supplemental hood latch, but the key was missing. I used that passage for cornering light/DRLs.

 

[Chingon1]

View attachment 14272

Oh no way that’s dope. Looks very OEM to be honest. the pros of having a garage to work out of haha

 

[XR7-4.6]

Didn't I send you that battery tray...over a year ago?

Fun fact: my roommate's Cadillac ATS comes stock with the battery in the trunk. One time, he disconnected it to clear a code which my app refused to clear for some reason; and then he closed the trunk! And there's no way in without power; base ATS without folding seats. We had to use jumper cables on the terminals under the hood just to open the trunk.

It's great that you could repurpose that firewall passage. I had the same luck: the original owner had a cable-operated supplemental hood latch, but the key was missing. I used that passage for cornering light/DRLs.

Probably, as you can see this wasn’t a hasty plan

This is actually technically the third repurposing of that hole as it from the factory was the ABS sensor wire passthrough…. Which I also deleted… but before I deleted ABS entirely I rerouted all the ABS wiring through the PCM harness on the passenger side to clean up the firewall, which conveniently gave me a spot for the battery cable to go when that came to fruition.

The Cadillac situation is how it is in my mom’s Prius V. The starting battery went dead on it and in order to open the tailgate to get to it you have to jumper the leads in the engine compartment.

 

[XR7-4.6]

Found an ingenious way to cover the hole in the trunk carpet; put something almost as heavy and cumbersome as the battery back in its place

 

[MadMikeyL]

Next project: making a factory cd changer work with an aftermarket head unit. Just because I can’t imagine you having anything non-functional in your car.

 

[Grog6]

Is it true that only the factory cd player had those controls? You'd need one of those to figure out the communication protocol, but a "bus pirate" would do it. Then a pic controller to do the actual talking to the changer.
But, a 256gb usb drive holds 10x what the changer does. Doesn't your Alpine do FLAC?

 

[XR7-4.6]

Is it true that only the factory cd player had those controls? You'd need one of those to figure out the communication protocol, but a "bus pirate" would do it. Then a pic controller to do the actual talking to the changer.
But, a 256gb usb drive holds 10x what the changer does. Doesn't your Alpine do FLAC?

Actually only the factory cassette deck has the changer controls. The changer harness physically plugs into the factory CD player but it doesn’t have the circuitry to control it.

All my music is digital now, I just listen to it off my phone with Bluetooth

 

[XR7-4.6]

Anyway this took forever. The damn cable bracket on the passenger side sure is a lot easier to access with the K member dropped lol



I did get the oil pressure sender in at least. The only thing accomplished directly related to the main project

 

[XR7-4.6]

Most of these pictures kind of suck but I’m beat and you can tell what’s going on in them

Starting from the… start….

Gauge harness going in!



That red wire coiled on the seat is a last minute addition, I had forgotten I powered the stock JBL sub amp from a wire directly off the battery and in searching for a hot at all times wire in the trunk area to no avail(closest is the RKE which I didn’t want to use) so I ended up running it into the gauge harness.



I haven’t tucked away the zeitronix wires yet but it helps to see how they’re run. I’m very happy with how it turned out under here, I kind of guessed where things key things would end up and they ended up exactly where I wanted



Such as that passthrough location. Literally follows the same path as the battery cable did, through the hole in the apron and under the frame rail… actually this one I used the close hole the fuel lines used since my harness had more flexibility than the single cable. I like this routing better



Once again following the path of the old battery cable from the cabin, the harness runs under the frame rail and directly to the starter B+ terminal. You can also see I managed to squeeze my hand through the k member/starter/oil pain tumor trap without getting stuck to run the ground wire to the block.

From there I took a path I didn’t intend to take but it turned out to be vastly easier than following the battery cable under the pan as I first planned



And from there I simply ran the wires to the senders




The coolant sender was fun to put in, didn’t want to drain the new coolant in spite of it literally going in place of the block drain, but I managed to get it swapped with only a little bit of an antifreeze shower


Still not done! I have a few ideas on what to do with the cluster gauges that will no longer function with these in their senders place (or will they???)

 

[Grog6]

If you're going to run both, make sure the reading doesn't change when you add the cluster ones. I don't think it will work accurately.

 

[XR7-4.6]

If you're going to run both, make sure the reading doesn't change when you add the cluster ones. I don't think it will work accurately.

I’m not intending to run them off the autometer senders, I’m going to try something completely different

 

[XR7-4.6]

Didn’t get too much done tonight but the gauges are.




I can’t believe I redid half my car’s wiring scheme for these things

 

[XR7-4.6]

Alright so I mentioned I had plans for the factory cluster temp and oil gauges now that the autometer senders have stolen their places… well here’s the half satisfying result…




Looks like I demodded the oil gauge to function like stock pointing toward the middle right? Well I kinda did. But notice the engine is not running! Did I cheat and simply snip the resistor jumper and run the connector to ground?


Nope I did something ludicrously complicated, making what was from the factory effectively a dummy light shaped like a gauge a DIFFERENT dummy light shaped like a gauge…



The heretofore unused oil level switch on my mark pan! Hey the gauge just says OIL, it doesn’t explicitly say pressure!

So simple enough right? Well… there’s a problem or several. First off the factory “analog” oil pressure switch is a normally open switch… eg you have no oil pressure the gauge reads 0 and the switch it open you’re having a bad time. You have oil pressure the switch closes gives a path to ground and your “gauge” points to the middle and you feel all warm and fuzzy

Digital gauges, or clusters with dummy lights(97) are the opposite with normally closed switches so the circuit grounds with low to now oil pressure to illuminate the light, with proper oil pressure it opens to turn it off.

Why am I explaining how these work? Because the level switch works the same way as the latter - low oil LEVEL the switch is closed and the message center will tell you to “fill your oil, dummy!”….which means plugging it in directly to the gauge works the opposite of how I want. Damn…

But then I had a vision, a vision of this!



This is what makes oil level sensing through an analog gauge possible!

So here’s what I whipped up



My expertly drafted diagram basically explains it. I actually made a mistake initially deleting the resistor jumper but in this circuit I need both a full current circuit the jumper originally in place for the pressure sender provided, but ALSO the resistor itself but in a different place in my added wiring to ground through the volt gauge - terminal.

The other thing is the modification to my slosh module… I actually forgot what exactly I did here because I did it years ago to stop the check gauges light from triggering from the oil sender but it is necessary for this mod as well since it’s expecting to see voltage through the signal circuit when running, which it isn’t.

Anyway, here is a quick clip in action with me manually shorting it to ground(you can hear the relay click)

The only sucky part is I had kind of hoped the oil temperature sensor part of the mark VIII switch would work for the temperature gauge(it once again doesn’t say *which* temperature! ) but it ohms our way way higher than the gauge sender unfortunately, closer to the ECT sensor.

 

[Grog6]

You could use a npn transistor and a couple of resistors. I'm interested; the 6qt pan I bought from Oscar has that sensor. Got a pinout?

 

[XR7-4.6]

You could use a npn transistor and a couple of resistors. I'm interested; the 6qt pan I bought from Oscar has that sensor. Got a pinout?

The outer two wires are the temperature wires(signal and signal return(which for a gauge can be ground). The middle is the level sender which grounds through the pan through the block etc.

Show me the way and I’ll follow! The stock sender at ambient temperature(bout 70° last few days) is about 200ohms and the oil temperature sensor was about 24k ohms

 

[Grog6]

You have any electronic parts? A 2n2222 transistor, a 10k resistor,a 330 ohm resistor, and a 10k pot will get you there.
I'll dig out my pan tomorrow;I need to drill some rivets, and see if my battery will charge. If it will work like I think, I can probably throw those parts in an envelope.