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Okay bd, I jumped the flasher terminals and here are the results: With test light on B- no visible light on either blades.
It sounds like there may be two issues. First, if zero turn signal power reaches the bulb, then there is an open in the left turn circuit to the bulb. Is there any change in power at the bulb contact when you energize the 4-way flashers with the turn signals cancelled?Haven't tried that yet, will do. Second, voltage measured on the turn signal contact when the park lights are on implies either a less-than-perfect ground to the lamp socket or cross-feeding between the turn and park lamp circuits. Was the park/turn bulb installed when you measured the extraneous voltage on the 'turn signal' contact?
It sounds like there may be two issues. First, if zero turn signal power reaches the bulb, then there is an open in the left turn circuit to the bulb...Second, voltage measured on the turn signal contact when the park lights are on implies either a less-than-perfect ground to the lamp socket...