h55 back up lights

[franklin40]

since i had the h55 swapped in my back up lights haven't worked. i have followed the wires are far as i can without unwrapping everything. i've tested a few spots. specifically there are two wires coming out of the plug front passenger side of the tranny. there's a yellow/green and a yellow/red wire. they go to a plug on the passenger firewall but are john ed by a black/white and a pure yellow. isolating the two to the tranny shows the green/yellow has 12volts when tranny is in neutral and reverse. the red/yellow has 6.5 volts in both neutral and reverse. this doesn't make sense to me. can anyone help me out how i should be testing this circuit? i'm kind of dumb with electrical

edit. sorry green/yellow has 0 in neutral and reverse. this is at the wires going into the harness so makes sense that there's no power when they're not connected.

i guess first off is 6.5 volts the correct number. seems to me it should be 12v

 

[Output Shaft]

Check the continuity of the backup switch in the tranny with a DVM. Disconnect the plug, put the tranny in reverse and see if the switch works.

 

[franklin40]

what's a dmv (not department of motor vehicles)? i did a resistance test with my ohm meter with the tranny in reverse and i gave me a number of 9. being that it's not infinity i assume that it's working.

 

[pandasfj]

He meant digital volt meter. Yes, it's working and if your out of reverse then the switch should be open and then you'll get no ohms .

 

[cruisermatt]

What do you have the connector on the transmission connected to on the FJ62 harness?

 

[franklin40]

as far i i understand it was the original harness for the a440 backup lights.

 

[cruisermatt]

Ok because as far as I know there isn't just one connector that is solely for the reverse lights in the a440f harness. I started investigating when I did my swap but gave up pretty quick when I found no leads here.

 

[franklin40]

did you ever get yours to work then?

 

[Godwin]

IIRC the wiring for backup lights and NSS were in the same connector.

 

[franklin40]

sorry. what is nss? apparently i'm not up on acronyms.

edit. figure it means neutral safety switch. will that play into effect at all in the swap? i know the tranny doesn't have one because i started it while in 1st by accident and it started to drive away on me

 

[4Cruisers]

IIRC the wiring for backup lights and NSS were in the same connector.

There are two adjacent connectors associated with the neutral start switch and the reverse lights on the FJ62s. One three position connector body has two terminals, one in the single position (I'll call it the top) and one in one of the two bottom positions. The top terminal is the common ("C") for both the park light ("PL") and for the reverse light ("RL"). The other three position connector body has three terminals. The top (single) terminal is for the reverse lights ("RL"). So for the H55f reverse lights to work you have to wire the reverse light switch on the H55f to the top terminals in each of these adjacent harness connectors ("RL" and "C").

And for the starter to get power you have to jumper the two bottom terminals ("B" and "N") on the connector with three terminals. There's a forum post on this jumper, with photos:

Fj62 3fe help

This excerpt from the FSM should help:

 

[franklin40]

Wires are done. This took some reading of old posts and figuring out. I tryed to make it as simple as possible. By doing the re-wiring you are doing 2 things: 1. By-passing the nuetral safety switch,(the truck won't start unless the Nuetral safty switch is by passed). 2 wiring the reverse light.

So, You need to look at the auto tranny on the side. there are 3 connectors; one near the rear and 2 near the front, each has wires that were connected that need to be re-connected. Archtimb had a good write-up on the process. Mine was slightly different I think because i decided to get rid of the connectors, so the wire colors are pre-connector. I decided I wanted less connectors hanging off the harness. I high-lighted in red the differences in wire colors on mine, on the write-up below.


Originally Posted by archtimb
This is for a H55 install.

Near the PS firewall are the electric connectors for your tranny & transfer. The transfer connections stay the same. We are dealing with the two round connectors for the tranny, one white, one blue. (Mine were both grey)

When your A440F is out, you will have an unused connection (on the wire harness) at the tranny for the AT temp. sensor. This connector will plug into the reverse switch connection on your new H55! This contains a yellow/red and a yellow/green wire.

Now comes the magic. You need to open the harness of your tranny connection where the two round connectors are. On the blue connector,(3 wire connector) cut and solder the two heavy gauge wires together (white & black)(Black/white and Black/red). This will jump out your NSS. Now would be a good time to install a NSS kill switch (hint, hint). Place a switch between the white & black and you will be able to select when your starter will work!

The light gauge black wire(blue) in the blue connector (3 wire connector) is one side of your reverse lights. Cut this and solder it to the the yellow/red wire going to the old AT temp sensor.

On the white connector,(2 wire) cut the blue wire and solder this to the yellow/green wire going to the old AT temp sensor.
Cut and cap the red (yellow/blue) wire on the white connector.
Done.


The pictures show:

1. The wire harness plug that connects to the Reverse Switch
2 The connectors and which wires you will use and cut.
3. The wires cut and connected before I closed up the loom and sealed it.
View attachment 433701View attachment 439267View attachment 439268

ok so i've tried to sort out what's going on using the above post.

i can find the three wire connector (my neutral start switch is already bypassed so i can ignore that part. i'm trying to figure out the test. i can get the red wire on the 3 wire switch connected to the red/yellow that now goes to the h55 and i can find the yellow/green that goes to the h55. i can't find a two wire connector that has a blue wire on any harness in the area. can any one direct me to which wire i should be using the yellow/green?

here's what i have. the three wire connector on the left has had the black/white wire connected to something else (brown wire) in a larger harness. i assume this is the nss bypass as it's one of the wires discussed. the red/blue one is supposed to go to the red/yellow one in the middle connector. that goes to the back up lights on the h55. the yellow/green running immediately beside it is also from the back up lights on the h55. the last connector is on the right and has three wires none of which are blue. is it a round connector like the one i show on the left or a squarish one like the middle and right connectors? it may have been chopped out at the time of my engine swap and buried in another bundle of wires. just don't know where to start looking.

 

[4Cruisers]

I'll try to put some info together on what I did. In my case, I'm using the FJ62 split transfer case with my H55f, so I decided to use the two switches in the rear case to power new indicator lights in the dash for transfer L4 and N. So I had to dig through the wiring in excrutiating detail. What I ended up with is:

4WD indicator

Transfer L4 indicator

Transfer N indicator

H55f reverse light switch

NSS bypass

I've got a hand-drawn wiring diagram in a notebook, including wire colors. Let me take a look and get back with some answers.

 

[franklin40]

thanks. i also used the split case but all my indicators work fine. just my back up lights dont work i appreciate your help

 

[4Cruisers]

There are two yellow w/green stripe wires in my harness (the sub-harness between the transmission/transfer case and the main harness), one from the A/T fluid temperature switch and one from the transfer neutral position switch on the rear of the transfer case. The yellow w/red stripe wire is the other wire from the A/T fluid temperature switch. Those two A/T fluid temperature wires are shown in the center of your photo, two of the four wires in that connector. The yellow and black w/white stripe wires in that same connector are from the transfer L4 position switch. The yellow w/black stripe and white w/black stripe wires in the other connector in your photo are from the 4WD indicator switch on the front of the transfer case. The yellow w/green stripe wire in that same connector is from the transfer neutral position switch mentioned in the first sentence. The connector you're holding has three wires - the black w/white stripe and black w/red stripe wires are from the neutral safety switch. Those are the two NSS wires that are jumpered to allow power to the starter, bypassing the NSS (I connected these in the main harness). The red w/black stripe wire is one of the two wires needed for the reverse lights to function. You need to find the blue wire in the main harness. The yellow w/green stripe wire going to your H55f needs to be connected to this blue wire in the main harness, along with the second wire from your reverse light switch connected to the red w/black stripe wire in the main harness.

I hope this helps. Feel free to ask for clarification.

Edit: How is the wiring currently run from the H55f to the engine compartment and the main harness? Were some of the existing (and no longer needed) wires re-used? If so, which ones shown in your photo (if any)?

 

[franklin40]

ill have to look around for a blue wire. the wires in with the two squarish connectors run side bi side from the tranny/transfercase from what i can see. no other wires coming or going from them from what i recall but ill double check. i have to find that blue wire. what harness are you referring to that houses said wire?

on a side note while i have you snooping under your hood would you see if you can find your tach wire as it comes out of the fire wall? i need to figure which wire it is. i had the colour code at one point (forget off the top of my head now) but there were a few of these colours all wound up into a jumble of unused wires and i need to know what else it's running with it to figure which harness i'm dealing with. thanks

 

[4Cruisers]

The first photo shows the main passenger side harness entering the engine bay, then splitting in two. The part of the harness going down towards the transmission has the blue wire. The second photo shows the end result of my re-do of this part of the harness, including the termination of all unused wires and the splice of the NSS wires, plus the connectors to the reverse light switch, the L4 position switch, the N position switch, and the 4WD position switch. The third photo is a close-up of the reverse light wires - you'll see the blue wire in that photo.

The lead to the tach is from the ignitor, the black wire in the connector at the ignitor. The other three wires at the ignitor should be black w/blue stripe, black w/green stripe, and black w/light green stripe.

 

[franklin40]

thanks so much for those pictures. should be able to find that blue wire now.

as for the tach a don't have an ignitor anymore. i have a diesel and that part of my harness has been trimmed back to around the middle of the fire wall so i need to know what it looks like coming out of the fire wall (and what its running with). my wires are all neatly wrapped up but in one big group which makes it a nuisance for trying to find stuff. the guy who did it did a pretty nice job but didnt leave me an easy puzzle to figure out what wire is what. i guess i'll need to spend time unwrapping everything to find what i need. i was hoping to just open up a portion of the wire highway and find what i need but that may just be wishful thinking.

 

[franklin40]

so out of the furthest harness to the passenger side i found 2 blue wires going to a two post connector. it has a blue and a blue/white (maybe blue/yellow) wire. is this the blue wire i need? i don't want to accidently hook up the self destruct wire!!

 

[franklin40]

The first photo shows the main passenger side harness entering the engine bay, then splitting in two. The part of the harness going down towards the transmission has the blue wire. The second photo shows the end result of my re-do of this part of the harness, including the termination of all unused wires and the splice of the NSS wires, plus the connectors to the reverse light switch, the L4 position switch, the N position switch, and the 4WD position switch. The third photo is a close-up of the reverse light wires - you'll see the blue wire in that photo.

The lead to the tach is from the ignitor, the black wire in the connector at the ignitor. The other three wires at the ignitor should be black w/blue stripe, black w/green stripe, and black w/light green stripe.

View attachment 1348385

View attachment 1348386

View attachment 1348387

and just to be clear where i'm looking its this part of that harness in looking in for the blue wire right?

my wires are such a mess compared to yours. i need to fix that.