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Old 03-29-2020, 12:42 PM
Bob Barry Bob Barry is offline
Jeep Doctor
Join Date: Apr 09, 2000
Location: Providence, RI
Posts: 8,273
My '88 did not have the heater shutoff-valve in the heater-hoses; I added a bypass hose from the XJ, tapping into I-forget-which under-dash vacuum hose to operate it automatically (which you can do with the '86-up dash that has the integrated heater/AC controls). It helped keep the passenger-compartment cooler when I was running A/C.

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