I have a 1988 GXL and my flashers keep flashing, I have unplugged the switch even and they still flash, I pulled the flasher box out, removed the unit from inside the black box and plugged it in then they started again, even with the switch out, very weird ,I even took it in the house and tried to reflow some of the joints to see if something was messed up, all looked good reconnected it and ,flash flash flash, they continue to go.
any help would be appreciated to get this working properly, I was thinking it was the switch stuck, but when I removed it and it continued I knew it wasn't that.
and I cant see what else it could be, tried to google it but no luck seems no one has this problem
thanks in advance
Brian

 

Does the car have the factory alarm?

 

not that I am aware of, how would I be able to tell,but I'm thinking not
thanks

 

You would have the alarm light located in the center console for one. Go to the CPU and find the 2nd largest plug as it should have about 7 wires to it where one is Light Green. Using a multimeter set to continuity, place one meter lead to the LG wire and the other meter lead to the Black wire in the same plug and see if the meter rings out or not.

 

ok will check this ASAP and get back to you thx

 

The LG wire provides a ground wire to activate the flashers so either that wire has a ground to it or the flasher unit is kaput.

 

Ok, what I found out Is that the car has theft , and the processor wasn't there, would that cause this problem, should I get one to replace it?

Or is this not a factor?

As for the flasher anyway to check that?
Looks good though, and the flashers are flashing,lol tux again for any help

 

Post #4.

The LG wire triggers the flashers when it has a ground which is why you need to do as suggested in post #4. If you find the wire does not have a ground then the flasher unit in the CPU needs replacing.

 

ok will chk that in the next few days, been getting dark to early here, thx for your help will post my findings after

 

ok I checked the plug as you said, and it showed .000 on the voltmeter, I also checked the power wire in the blk/blue and used the lt.grn. wire as the ground and it showed voltage, so I dont know what to do here, do I run a new wire for this lt green one or do I do something else, but it seems the flasher unit is good,correct?
I also swapped in another flaser unit I have aquired and it does the same, keeps flasing with the switch unplugged, and as soon as I plug the flaser in it starts flasing.
thanks again

 

The LG wire triggers the flashers if it has a ground on it. Disconnect the plug from the CPU which houses the LG wire, set the meter to continuity and place one meter lead to the LG wire and the other meter lead to a ground source such as the Black wire in the same plug to see if the meter rings out or not. The LG wire should only have a ground to activate the flashers. When it has a ground it will activate the flashers. If it has a ground then you need to figure out why it has a ground. Chances are if you placed voltage to the LG wire it would cause the flashers to turn off when the plug is connected to the CPU.

 

now i understand that the switch is only supposed to send ground to the lt green wire when engaged, and when its off the switch there is no ground, so when I used the lt. green wire to check voltage for the blk,/blue power wire to that same plug it showed voltage on my meter, so it seems to have ground all the time since the switch has been removed, any ideas where it could be getting the ground from?
does that lt. green wire come directly from the switch?
can I just run another wire form the switch or where ever the lt. green wire comes from?
thanks again

 

That's a workaround, not a fix.

Find out what is going on before you decide to bypass stuff.

 

That's why I asked you if the car had the alarm because the LG wire runs to the alarm in addition to the flasher switch. The wire which leaves the switch to provide a ground to the flasher unit is not colored Light Green but is Green/Orange. Before the G/O wire reaches the flasher unit it goes to connector FC-01 which mates the G/O wire to the LG wire. So, the grounding of the wire can be coming from the G/O wire or the L/G wire and the LG wire comes from the alarm unit too. Now you stated the alarm unit has been removed. Are you 100% certain of this and if so did you find the plug which connects to it just dangling (and this plug should have the LG wire to it). If you unplug the flasher plug that has the LG wire and w/the meter set to continuity place one meter lead to the LG wire in the flasher plug and the other meter lead to the LG wire in the alarm end plug and if the meter rings out then you know you have the plug to the alarm unit identified.

So, the grounding can come from two different wires, either the G/O or the LG. W/respect to the LG wire it can be coming before FC-01 on the front side of the harness or on the other side of FC-01 which is where the G/O wire is (G/O runs from the switch to FC-01)

 

ok i figured it out there was a plug on the pass side near glove box that was plugged into what looked like a plug from the back of the controls for the heater, that plug was fed for some reason to that side, I did see a plug on the driver side near the top that I belived was the one for that heater control plugged that one in there, and then preceeded to plug the theft contol box into the one near the glove box and that was it, I think, since now the flashers work properly.

2 other quick questions, there looks to be another spot to plug a small connector in on the theft box, is that supposed to be filled, dont see any other connectors around that area that look to fit in there?

the other question is there was another harness plug(female) I found on pass side up in the back near firewall , was a big blue harness plug maybe close to 20 connectors but there was at least 4 on one side that had no wires in it, any idea what this is for?
thanks again

 

There's only one plug to the alarm unit.

Not all plugs which have X amount of wires has a corresponding plug connected to it which has the same amount of wires. Plus not having the wire colors doesn't help.

 

ok, thx I will try to get a picture of the plug and the colors and hopefully that will help, just curious because I don't want to not hook it up if it has an appropriate connector to plug it into.