So, my little guy has an annoying issue, and I just want to check with you guys/gals to see if this is normal Mighty Max/Mitsubishi operation or if it's something I should look into.
My check engine light is on, and I can cope with that, because it's the idle speed control thing, and it's slightly out of my budget and only rarely causes driveability issues. What does irk me, is that the check engine light (and the e-brake light) flickers slightly whenever the turn signal is on in rhythm with the turn signal, as will the dome light if I have it on, and these lights will also blink marginally when the brake is applied.
I was wondering if this is the nature of the beast, because I recall my father's '91 Mitsubishi Fuso did the same thing. I have the stock 42-Amp (or whatever) alternator, which I laughed hysterically when I heard how low the OEM alternator is!
So is this slight lamp flicker something that is completely normal in these vehicles? The electrical systems are so much less complicated than the hundreds of wires in an 80's GM, there are so few feeds and grounds. I'm willing to get into the grounds if this is abnormal behavior, but of my old man's Mitsu did it, maybe it's normal?
One other possibly related thing, if I have the lights on and I turn the dash dimmer down, my radio will cut off. The radio will also cut off/on/off/on sometimes when the volume is up high - aftermarket Sony running stock dash speakers and a 13-yr-old set of 6x9's, no subs... yet - and the dome light will actually flicker with the music as well when I turn it on. It may or may not be related to a possible cruddy ground somewhere, which is why I included it.
The on/off behavior also happened with some no-name aftermarket deck that came with the truck, running just the dash speakers, but the battery also had 2 dead cells and the truck had been sitting a year, so I didn't think anything of it at the time.
Since then, new battery & terminals, new battery ground cable, new alternator, and I cleaned the fusible link box and oxidation off those terminals. Thinking about running a dedicated ground wire for the stereo directly to the battery, but haven't done it yet.