Ford Repair Questions? Ask a Mechanic for Answers ASAP
No, the front turn signals - rear ones work, but front ones don't. Left front stays on, always, and bulb has to be removed so battery doesn't drain. Right doesn't work at all. Tried replacing both bulbs. Removed instrument cluster, on a long shot, looking for flasher, and "What, to my wondering eyes should appear...", not a miniature sleigh, and eight tiny reindeer, but the work of a cost-cutting (why else?) genius who had incorporated it with the instrument cluster. Bah. Humbug! My 91 Olds looks better and better all the time.
Principles of Operation
The smart junction box (SJB) monitors the multifunction switch position by sending multiple voltage reference signals to the multifunction switch. When the multifunction switch is in the LH or RH TURN positions, or the hazard lamp switch is engaged, that input signal is routed to ground.
When the SJB receives a request for a turn signal or hazard lamps, the SJB supplies voltage to the appropriate turn lamps.
Normal Operation — Fusion
When the smart junction box (SJB) detects the multifunction switch in the LH TURN position, the SJB sends voltage through circuit CLS21 (BU/GN) to the LH front turn lamp. When the SJB detects the multifunction switch in the RH TURN position, the SJB sends voltage through circuit CLS25 (YE/VT) to the RH front turn lamp. Circuit GD123 (BK/GY) and circuit GD121 (BK/YE) provide ground for the LH and RH front turn lamps, respectively. The rear turn lamps are controlled utilizing the rear stoplamp circuits.
Thanks for the information. I would be glad for you to send me the test procedures and replacement instructions for the SJB. (Is that the same kind of "smart" as the "Smart" car? Like, not too?Stephen