Testing ignitio swithces

Tiny
DAVIDE123
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  • 1990 TOYOTA COROLLA
  • 1.6L
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 75,000 MILES
Was talking to mhpautos about a problem he said to repost. But all the info is at:

https://www.2carpros.com/questions/no-power-to-anything-needing-key-on

Trying to get where to test on back of plugs and what is what
here is my last reply:

January, 31, 2016 AT 1:47 PM
I can test back of plug but not sure which is which.
Back of 8 Pin: BLK/RED [ ] [ ] BRN
BLK/BLU [ ] [ ] BRN/WHT
BLK/YEL [ ] [ ] (OPEN)
BLK/WHT [ ] [ ]BRN/RED
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Monday, February 1st, 2016 AT 9:18 PM

20 Replies

Tiny
MHPAUTOS
  • MECHANIC
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Finaly found what I was looking for, this should help you with the switch wiring.
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Tuesday, February 2nd, 2016 AT 4:09 AM
Tiny
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Thanks I will see if I will look it over and see if I can figure anything out.
Appreciate your help.
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Tuesday, February 2nd, 2016 AT 9:15 AM
Tiny
MHPAUTOS
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OK, keep in touch.
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Tuesday, February 2nd, 2016 AT 12:39 PM
Tiny
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Ok I figured out what goes to what sort of.
I checked 3 input to switch brown from fusible link to Am2 is 12 v. Steady ok. But white was not clear at first I saw 12 v then I turned key to check one of its outs nada, but I lost 12 v in (white) AM1.

So currently on my way to work again. I think it has something to do of not getting 12v to arm 1. (Wht).

According to the diagram it comes directly from a fusible link, (on the battery or somewhere else?
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Tuesday, February 2nd, 2016 AT 1:38 PM
Tiny
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There are 3 fusible links on right at the + side of the battery they all look to be making contact (not burned open. One is blue when is red one is green
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Tuesday, February 2nd, 2016 AT 1:42 PM
Tiny
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So. It seems to go>>> +Battery terminal > Lug > Fusible link (not sure which one r/bl/grn) > Cable (wire) to ARM 1. What do you think?
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Tuesday, February 2nd, 2016 AT 1:49 PM
Tiny
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Mhpautos let me know if you an idea
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Wednesday, February 3rd, 2016 AT 12:42 PM
Tiny
MHPAUTOS
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Start with checking the continuity of the fusible links, we need to know if they are OK.
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Wednesday, February 3rd, 2016 AT 11:13 PM
Tiny
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I took off the connector and boot at the
+ term with the 3 FLs. Clipped on to connector and got continuity at each place they connect. They do not seem to want to unplug. Also the visual looks ok.
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Thursday, February 4th, 2016 AT 9:39 AM
Tiny
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Ok I watched a vid and pulled fuses. All have continuity at there lugs. Currently the are not installed.
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Thursday, February 4th, 2016 AT 10:25 AM
Tiny
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I have put FusLinks back I am get a voltage +12 to arm2 but a drop at arm 1 (white wire from battery). I do not see anything between the switch and the fusLink.

Is there something that can cause the V to drop (getting about 9v).
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Friday, February 5th, 2016 AT 6:32 PM
Tiny
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Again thanks for your help, I guess I should start removing the wire shroud and see if there is a problem in the wires. Unless you think something else may be causing the drop
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Saturday, February 6th, 2016 AT 10:22 PM
Tiny
MHPAUTOS
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Try running a jump wire to see if things improve, if you head down the path of checking the loom check for any points that have a bend or are unsupported as this is where you may find a damaged wire.
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Saturday, February 6th, 2016 AT 11:00 PM
Tiny
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Thanks, for your suggestions. I assume the loom is the serrated plastic that covers the wires. Are there points where I can jump as I found a wire diagram.

BUT it shows sw continue F Link --- Bat+
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Monday, February 8th, 2016 AT 9:58 AM
Tiny
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Ie no junction just strait wire. Thanks for your support.
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Monday, February 8th, 2016 AT 9:59 AM
Tiny
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Ok Im done
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Monday, February 8th, 2016 AT 5:16 PM
Tiny
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Ok I m done. Thank you for all your support.
I undid the shroud. At the junction the wire was disconnected. It looke like blue perhaps old terminals
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Monday, February 8th, 2016 AT 5:17 PM
Tiny
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The white wire had no connection. At the junction I cut the wires and splice a new wire. (Soldered in) reassembled taped WOW crazy I am tired.

Test drove OF now. Again thanks and hope this helps someone else trying to figure why they have no power to anythingggggggggggggggggggggggggggggg.
God less. Davide
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Monday, February 8th, 2016 AT 5:20 PM
Tiny
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Sorry GOD BLESS Davidee.
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Monday, February 8th, 2016 AT 5:21 PM
Tiny
MHPAUTOS
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Do you have continuity down to the ignition switch? Sorry but a lot of water has gone under the bridge since we first looked at this problem, I an re loading the info into my head so we can pick up and move on.
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Saturday, April 23rd, 2016 AT 5:15 PM

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