Hi, is there a difference between the headlight motor isolation rely and the pair of headlight motor relays on an 85 fiero? I can't seem to locate the isolation relay on the fiero store site. Thank you. My pass side headlight motor keeps clicking intermittently even though it is in the down position. It dims the interior lights and will eventually drain the battery. I think the limit switch isn't working properly, but I figured I'd ask about the two different associated relays first. Thank you. Louis Duet and "Blue"
------------------ ===Always trying to find time to work on cars=== Louis Duet Baldwin, Long Island, NY Where driving hard is SOP. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Blue" <= '85 Fiero GT Stock V6---Stock everything. Trying to keep it 'mostly' that way. ~~~~~~~~~~~~~~~~~~~~~ "Boo" <= '81 Delorean DMC-12 The "DuetLorean" VIN #5835 Stock PRV engine Robertson Equipped Neiland/Delman Engineered Carbed and loving it! (Peugot 604 manifold) ---"Sorry purists"
Thank you, I know that. And the isolation relay isn't on the fiero store website. Only the headlight motor relays. They are the same relay on rock auto and in autozone. I do not think its the relays because the motors work fine. Even the gears are not stripped. I think it's the limit switch on the pass side. I cleaned up the drivers side limit switch when I soldered the brush back on, but I haven't touched the pass side at all. Thanks for your advice though !
------------------ ===Always trying to find time to work on cars=== Louis Duet Baldwin, Long Island, NY Where driving hard is SOP. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Blue" <= '85 Fiero GT Stock V6---Stock everything. Trying to keep it 'mostly' that way. ~~~~~~~~~~~~~~~~~~~~~ "Boo" <= '81 Delorean DMC-12 The "DuetLorean" VIN #5835 Stock PRV engine Robertson Equipped Neiland/Delman Engineered Carbed and loving it! (Peugot 604 manifold) ---"Sorry purists"
The motors won't shut off. They twitch/kick every few seconds to a couple minutes... This likely is caused by one of thee things or it could be all these things at once. The limit switches cut off but there isn't enough lockup friction in the gearing to hold them. The armature slips and each time it does, the motor kicks on. The motor never activates the limit switch. When that happens, the motor won't cut out until a thermal circuit breaker inside the thing trips. When the breaker cools, the motor turns on and cooks until the breaker trips again. A relay is sticking and tripping the thermal breaker in the motor. Same result as #2.
It can't be the relay because I swapped the drivers and pass side relays and the pass side continues to act this way.
------------------ ===Always trying to find time to work on cars=== Louis Duet Baldwin, Long Island, NY Where driving hard is SOP. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Blue" <= '85 Fiero GT Stock V6---Stock everything. Trying to keep it 'mostly' that way. ~~~~~~~~~~~~~~~~~~~~~ "Boo" <= '81 Delorean DMC-12 The "DuetLorean" VIN #5835 Stock PRV engine Robertson Equipped Neiland/Delman Engineered Carbed and loving it! (Peugot 604 manifold) ---"Sorry purists"
The RH side motor on my '84 SE was twitching & running the battery down. I took it apart a few times, cleaned it but couldn't determine what was malfunctioning. I've replaced the gear a couple of times over the years. I ended up getting a set of motors locally that were still riveted together. I think I paid $50. When I installed the RH motor, the twitching disappeared. I got another still riveted set from a local pick & pull ($23); one needed a gear the other is ok. Spares are good! (It wasn't the top 'O' ring seal being out of place during reassembly - sometimes that's the reason.)
[This message has been edited by David Hambleton (edited 03-28-2014).]
Well, I guess I'll have to take the pass side motor out, clean it up inspect that o ring, and see how it works. Ill search for gen 2 motors to swap I guess. I didn't want to spend too much $$$ on it. Trying to clean it up will just be time consuming. Hey if I soldered the drivers side brush on, cleaning up the pass side shouldn't be so bad. Hope that fixes it. Thanks for all the info. Keep it coming !
------------------ ===Always trying to find time to work on cars=== Louis Duet Baldwin, Long Island, NY Where driving hard is SOP. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Blue" <= '85 Fiero GT Stock V6---Stock everything. Trying to keep it 'mostly' that way. ~~~~~~~~~~~~~~~~~~~~~ "Boo" <= '81 Delorean DMC-12 The "DuetLorean" VIN #5835 Stock PRV engine Robertson Equipped Neiland/Delman Engineered Carbed and loving it! (Peugot 604 manifold) ---"Sorry purists"
That top "O" ring as it's being called really isn't an "O" ring. Its "D" shaped and it's a weather seal. It can only be out of place if the motor has previously been opened up and the assembler failed to get it back into it's place in the top of the case halves.
The Isolation Relay is no longer available and hasn't been for 6 or 7 years and then if you could find them it was just left over NOS. The Isolation and the Motor relays are not interchangeable, though they will plug into one another's harness connections. The only source of an isolation relay is to get a used one. Motor relays are still available at auto parts stores.
I had major problems with the plastic gears from TFS, having to rebuild more than a dozen motors under my warranty. They gave me replacement gears but they also proved inferior. I asked that they notify me when they got the problem resolved and I've heard nothing. I would currently recommend Rodney's metal gears because they use a bumpstop to cushion the stop at the end of the up or down travel, just as the factory gears used. TFS metal gears are metal on metal, exerting all the force on fragile metal fingers of the drive plate. That plate is not available on the aftermarket.
I have the headlight relay as the isolation relay and the setup works just fine, it reacts to the headlight switch and everything works great. It's just the intermittent clicking on of the pass side motor. I think it's the limit switch.
But I'll ask on the mall if anyone has a working isolation relay to offer. Thanks !
------------------ ===Always trying to find time to work on cars=== Louis Duet Baldwin, Long Island, NY Where driving hard is SOP. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Blue" <= '85 Fiero GT Stock V6---Stock everything. Trying to keep it 'mostly' that way. ~~~~~~~~~~~~~~~~~~~~~ "Boo" <= '81 Delorean DMC-12 The "DuetLorean" VIN #5835 Stock PRV engine Robertson Equipped Neiland/Delman Engineered Carbed and loving it! (Peugot 604 manifold) ---"Sorry purists"
[This message has been edited by Lou and Blue (edited 03-28-2014).]
Using that part number all I'm finding is it is unavailable everywhere. Is yours new? How much would you want for it. I am using a headlight relay for the isolation relay and it seems to work fine. But I thought I'd ask around to try to put the exact right part in.
Any info is appreciated. Thank you
I PM'd you Fierofool. Thanks again!
------------------ ===Always trying to find time to work on cars=== Louis Duet Baldwin, Long Island, NY Where driving hard is SOP. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Blue" <= '85 Fiero GT Stock V6---Stock everything. Trying to keep it 'mostly' that way. ~~~~~~~~~~~~~~~~~~~~~ "Boo" <= '81 Delorean DMC-12 The "DuetLorean" VIN #5835 Stock PRV engine Robertson Equipped Neiland/Delman Engineered Carbed and loving it! (Peugot 604 manifold) ---"Sorry purists"
The circuitry of the isolation relay and the motor relay are different. That's the reason for different part numbers. New isolation relays are no longer available unless you find one from a private individual.
I think I fixed the issue, I checked the isolation relay and I had the correct part number in place already. Today I removed the pass side headlight motor and took out the limit switch. I bent the tab of the limit switch so the metal bar didnt have to travel as far to press on the arm of the switch. I reinstalled the motor and no more clicking , no more battery drain! I hope this stays fixed! Thank you to all who replied and gave advice, either on this thread or via PM.
------------------ ===Always trying to find time to work on cars=== Louis Duet Baldwin, Long Island, NY Where driving hard is SOP. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ "Blue" <= '85 Fiero GT Stock V6---Stock everything. Trying to keep it 'mostly' that way. ~~~~~~~~~~~~~~~~~~~~~ "Boo" <= '81 Delorean DMC-12 The "DuetLorean" VIN #5835 Stock PRV engine Robertson Equipped Neiland/Delman Engineered Carbed and loving it! (Peugot 604 manifold) ---"Sorry purists"