That's a Tantalum capacitor, they are polarity conscious. I was using the cigarette lighter power adaptor so IDK if it can get shorted inside. Is the top, two pin dark coloured block the I/P for the power supply? (I'm guessing it is since it's the only two pin socket). You may need to check the polarity of your cig lighter. Something tells me in the dark recesses of my mind, that they are wired reverse to what most manufacturers of cig lighter PSU adapters expect. But I could be wrong  . It's worth checking. HTH's 
'74 Challenger..9.46 @ 145.9 1/4, 6.001 @ 118 1/8 so far. 4023lb !!! # N/A, Marsh performance 655ci, Indy Maxx, T/R, Indy 600-13 X's, Street legal, pump gas, full interior, Cal-Tracs, mufflers, 3:73's and real 10.5 radials.
9.51 @ 142.4 1/4, 6.003 @ 114 1/8 with our old mule KB, 572-13, 580 wedge.
RHD '68 Barracuda Fastback 323ci street/strip. Best ET 13.88 @ 99.03
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