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I had a 1983 and a 87 some parts were interchangeable
1243
1-8-4-3-6-5-7-2
Ignition Module is BAD
The dash has to be removed to gain access to the heater box. The heater box then comes out and is split open to replace the core.
Remove the water supply hoses from your 1985 Chevy heater core. Remove the heater core retaining bolts. The heater core will come out. Reverse the process to install your new heater core.
The question you ask is too involved for a proper answer. You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00 Or, go to a Public Library.
To replace the heater core of a 1985 Bronco 2, open the glove box and push on the 2 tabs that hold it in place. After removing the entire glove box, remove the round plastic screws of the heater core. Remove the old and replace with a new one.
The answer can be found at www.dippy.org. I just did this last week
Jade Yorker is 32 years old (birthdate June 16, 1985).
Jade Yorker was born on June 16, 1985, in New Jersey, USA.
If they disconnected the heater core, it means it was leaking. Get a manual on your car from the parts store and it will show you how to replace the heater core also