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exhaustbrakemod.jpg | Hits: 217 | Posted on: 2/10/20
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'97 7.3L Exhaust Brake Modification
Note that, because the BOO circuit is always hot, the mod relays will click even with the key OFF. And they will work with the truck in PARK or NEUTRAL. A disable switch could (should?) be added between the original BOO circuit and the relays.
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