jbldsdad
New Member
- Joined
- Dec 19, 2020
- Messages
- 14
- Reaction score
- 3
- Points
- 3
- Location
- 83634
- Vehicle Year
- 1986
- Make / Model
- Ford Bronco 2
- Transmission
- Manual
[1986 Bronco II, 2.9 v6]
Great help from this forum over the past few years helping me resurrect this gem from the dead.
Detailed her last week to a beautiful shine.
With the summer still on, I figured I'd take on the (stock) A/C. Replacing hoses, I figured I'd check the compressor before closing the checkbook.
With a direct jump from the batter, car running, the clutch engages and runs!
Otherwise...no A/C from inside the cabin, so I started troubleshooting. (Clearly I'm stuck, or I wouldn't be posting...)Found the 30A fuse blown, so replaced that.
I add a jumper between pressure switch blades (Just to eliminiate a possible failure there) and the fuse blows.
I removed all tape and plastic casing around the B/lg wiring headed to the compressor for a visual inspection, and I see no visible shorts. I confirmed the ground wire is clean/secure on the passenger wheel well. Just for kicks, I test for voltage on the A/C clutch connector (red lead to the battery "+"), and both blades read 12.38v.
Here's where I'm raising my hand for what to check next.
Other than the fusible link, I wouldn't think there'd be a closed circuit between those two blades, so maybe a short in that connector?
I'm also curious about the BK/Y wire coming off the A/C compressor (one leg goes to the pressure switch, the other seems to head to the EEC), as that white connector looks confusing. (4 red wires, B/Y and a ground wire all meet)
Any recommendations on where the short might be?
Great help from this forum over the past few years helping me resurrect this gem from the dead.
Detailed her last week to a beautiful shine.
With the summer still on, I figured I'd take on the (stock) A/C. Replacing hoses, I figured I'd check the compressor before closing the checkbook.
With a direct jump from the batter, car running, the clutch engages and runs!
Otherwise...no A/C from inside the cabin, so I started troubleshooting. (Clearly I'm stuck, or I wouldn't be posting...)Found the 30A fuse blown, so replaced that.
- A/C button pressed (defrost mode), the light illuminates...
- WOT relay (picture attached) seems to fit the "2.3L EFI" diagram from this post. With the WOT relay removed (KOER) I read:
- 13.63v from the far left red wire (See picture below)
- .43v from the center red wire
- 13.73v from the Lg/P wire
- -.04v from the B/lg wire
- WOT relay installed (KOER) I read:
- 13.60v from the far left red wire
- 13.6v from the center red wire
- 13.65v from the Lg/P wire
- 13.65v from the B/Lg wire
- 13.6v on the near-side of the pressure switch connector.
I add a jumper between pressure switch blades (Just to eliminiate a possible failure there) and the fuse blows.
I removed all tape and plastic casing around the B/lg wiring headed to the compressor for a visual inspection, and I see no visible shorts. I confirmed the ground wire is clean/secure on the passenger wheel well. Just for kicks, I test for voltage on the A/C clutch connector (red lead to the battery "+"), and both blades read 12.38v.
Here's where I'm raising my hand for what to check next.
Other than the fusible link, I wouldn't think there'd be a closed circuit between those two blades, so maybe a short in that connector?
I'm also curious about the BK/Y wire coming off the A/C compressor (one leg goes to the pressure switch, the other seems to head to the EEC), as that white connector looks confusing. (4 red wires, B/Y and a ground wire all meet)
Any recommendations on where the short might be?
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