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Not sure how much you know about the brake light system and the Bulb Failure Warning Relay (BFWR).
If you're blowing fuses there has to be a short somewhere - the trick is to find it.
If you replaced the tail light assemblies I'll assume there's no short there. But look at those circuit boards, maybe something got torn? Happened on our 240 sedan.
Did you check the center brake light? Not a likely place for a short but it could happen I guess. If you don't see one in the housing you could temporarily snip the hot lead to it, in the trunk - and see if it stops blowing fuses. See your owners manual for how to get into the center brake light. You push a screwdriver into the small hole on back side.
Problem could possibly be in the BFWR. Consider swapping in a known good one from a friend's car. Look up compatible years on fcpgroton.com. I think any year with center brake light is a match, but check at fcpgroton. I think BFWR is not a very likely cause of a short so don't throw big money at it right away. My understanding is they ususally fail in NOT lighting the lights, or in giving false bulb failure warnings.
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Sven: '89 245 NA, 951 ECU, open-front airbox, E-fan, 205/65-15's, IPD sways, E-Codes, amber front corner reflectors, quad horns. Wifemobile '89 245 NA stock. 90 244 NA spare, runs.
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