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Topic: rewiring some switches question (Read 1293 times) previous topic - next topic

rewiring some switches question

I messed up the switch holder on the ride control /premium fuel/antennae switches when I took them out so I bought some rockers to rewire them. The ride control is simple but I have a question on the premium switch.  It has 3 wires so is that just a simple power, ground, ECU circuit?  Then the antennae...it has 4 wires and looks like some resistors.  Do I need to add a circuit breaker for each pair of wires?  I bought simple 3 pr0ng rocker switches and a 3 position on-off-on switch for the antennae.

rewiring some switches question

Reply #1 –
The premium fuel switch is a simple switch.
The red wire is voltage from fuse 18, hot in start or run.
The black wire is ground.
The yellow wire goes to the premium fuel relay.
In the premium position you should have voltage on the yellow wire.
In the regular position you should have ground on the yellow wire.

The antenna is not a simple switch.
It has to reverse the polarity on the antenna motor. It is similar to the power window switch.
The Y/BK wire is voltage from fuse 11, hot in accy or run.
The black wire is ground.
The EVTM doesn't show the color of the other two wires that go to each end of the motor.

My scanner is currently out of service, so I can't post a copy of the EVTM page for you.

rewiring some switches question

Reply #2 –
I would just pick up a new switch panel.  John (hcor) has at least one in stock.

http://cgi.ebay.com/ebaymotors/1987-88-THUNDERBIRD-FUEL-RIDE-ANT-SWITCH-_W0QQcmdZViewItemQQhashZitem2c585474e4QQitemZ190460490980QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

Edit: just saw he said switches not included, but I'm sure he has them available too.
1986 Mercury Cougar - 2.3T/T5 swap, TC brakes and suspension and rearend, 3" exhaust, 255 lph fuel pump, Stinger BOV, Gillis MBC @ 18 psi
2003 Chevy Suburban Z71 - Daily driver
2015 Chevy Volt - Wife's daily driver

rewiring some switches question

Reply #3 –
softtouch,
there is no yellow wire on the premium fuel switch.  I have a red/yellow stripe, solid black, and a black w/white stripe.  Can I assume the blk/white one is the same as the yellow?
 

rewiring some switches question

Reply #4 –
Quote from: lakenheath24;340965
softtouch,
there is no yellow wire on the premium fuel switch.  I have a red/yellow stripe, solid black, and a black w/white stripe.  Can I assume the blk/white one is the same as the yellow?


I am using the 87 EVTM. I don't have one for 88. It does show the wire from fuse 18 is R/Y. Sorry I screwed up there.
You may want to put a meter on the R/Y wire to see if it is 12v with the ignition in run.
As far as assuming the B/W is the same as the yellow, well that would be my guess.
The yellow wire in my EVTM provides 12v to pick the premium fuel relay.
The relay contacts put the EEC signal return (logic ground) on EEC pin 24. The EEC sig rtn wire is BK/W. So it makes me wonder if they did it different for 88. Maybe they got rid of the relay.
Hopefully someone with an 88 EVTM will chime in.

rewiring some switches question

Reply #5 –
I got my scanner hooked-up again. Here are some diagrams from the 87 EVTM.