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My BII

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Old 03-11-2011, 01:40 PM
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My BII

Hey guys my BII 1986 with v-6...the EMISS light came on...any idea how to get rid of it easy...
It just passed the emission test for the next two years...a bit confused why it is on.
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Old 03-11-2011, 02:11 PM
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emiss light?? i havent seen one of those..you could put tape over it lol....
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Old 03-11-2011, 08:32 PM
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I'd check its' stored codes and start from there.
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Old 03-12-2011, 07:19 AM
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O-boy so how do you do that?
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Old 03-12-2011, 08:15 AM
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It used to be posted here, but this link should work. You can find readers on Ebay.

Ford Ranger/Bronco II EEC-IV Testing
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Old 03-12-2011, 08:47 AM
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The Emissions light?

Hey, Tim,

I'll ask a true authority to chime in here to confirm but, until then, my knowledge of the
80-86 EMISSIONS light is, that thing is on a timer (Ford calls it an Implied Mileage
Sensor) to come on approximately every 50,000 miles, its sole purpose is to remind you
to service the vehicle.

The sensor can be reset for another 50,000 miles by using a (I think) paper clip to to
push a microswitch in the sensor but I'm not sure of this thing's location, we'll have to
wait for somebody who knows for certain. IMHO a device like this can't be real hard to
get to, shouldn't require any major disassembly of anything to access it.

Yes, it's a way for Ford to make money by having people bring it in to the dealer but,
before you criticize them, know that this is still done.... I had to look up how to do this on
a friend's mid-90s Acura Integra, it's got a dash light that comes on periodically to remind
the owner it's time for maintenance. The box & button is easily accessible by reaching
under the dash near your right knee, but of course the Owner's Manual doesn't mention
that little fact........

A 1986 model, I'd imagine that has a TFI/EECIV igntion system which I believe is still
OBD1, instructions for checking codes yourself are at:

Ford Fuel Injection
This looks to be the same info available in the link posted by FL1A above, choose
your poison.

Alternatively, you can probably borrow a code reader to use in the parking lot of a
Checker (O'Reilly) store, hopefully the snot-nosed teenager employees can figure out
how to use it, your truck doesn't have any bar codes or anything like that.....
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Old 03-12-2011, 05:14 PM
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The first year of the check engine light on the F-series, and full sized bronco is 1988. This light is hooked to the EEC for diagnostics.

The emissions light, 1984-1987 F-series and Bronco, is as CTBUTIS described.

Not sure when the Bronco-II switched over as these were based on the Compact Ranger pickup, but I would assume around the same time frame, +/- a year.

My books only cover the F-series and Full sized Bronco, so can't tell you an exact location. On the F-series it's a square box, located underneath the dash, next to or around the fuse panel area.
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Old 03-12-2011, 10:30 PM
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Thanks, 81!

I looked at some Bronco IIs in the junkyard today but couldn't find the thing... I found a
small box down behind the the passenger side kick panel near the computer but it didn't
have a hole in it, must be something else.

On some mid-80s cars, I see a lot of those small electrical boxes about the size of a flash
cube (remember those?) near the center of the the firewall under the dash, near some
heater/AC vents.

Tim - 81 tells us the hole will have a small piece of tape over it if it's never been reset
before.

I know I've seen it in one of my Ford books (I think there's also a drawing depicting
resetting the thing) but I can't seem to find it when I'm looking for it.
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Old 03-13-2011, 10:23 PM
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the box under the carpet on the pass side floorboard is the inertia switch, (crash switch) fuel shut off. The emmision reset switch on mine is under dash, pass side. open the glovebox, push in sides so it falls all the way down, straight up underneath, if key buzzer works, right next to it. Think i used a little screwdriver, or allen wrench or something
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Old 03-13-2011, 10:28 PM
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or as 2 tall says, (piece of tape on it) go a step farther pull dash panel, remove lightbulb, replace dash, live happily ever after.
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Old 03-13-2011, 10:32 PM
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pita...code reader, lots of reading, following directions, llll llll ---lll ---lll, b.s. if u don't have the patiece for it, i don't
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Old 03-13-2011, 10:46 PM
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Quote:
Originally Posted by Clint1973 View Post
the box under the carpet on the pass side floorboard is the inertia switch, (crash switch) fuel shut off.
Aren''t those resettable via an external button? The one I saw had no such button.
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Old 03-13-2011, 10:49 PM
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Quote:
Originally Posted by Clint1973 View Post
pita...code reader, lots of reading, following directions, llll llll ---lll ---lll, b.s. if u don't have the patiece for it, i don't
But is pretty much the only way of asking the computer what it thinks is happening.
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Old 03-14-2011, 12:45 AM
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yep and yep, crash switch has a button on top of it, and to run the codes, to get all of em and erase em and stuff takes awhile, lot of steps followed in order. Got my reader at autozone for 20 bucks plug it in count beeps, actually i make slashes, and leave spaces, till i have 2 same groupings, then count em and see what the codes are by the charts. never went past that, one of these days when i'm old and patient i'll read into it and go through all the steps
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Old 03-14-2011, 11:27 AM
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Here's a vote for pulling the dash/cluster and removing the bulb.......
I believe, on the 2.8 equipped B2s (84-85), there was a reset on a small module near the glove box area under the dash, for the emis. light........if that carried over to the EFI 2.9, I do not know.
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