[Supras] Electrical Problem

[Bob]

Two possibilities.

The guys at Sears are idiots and really your battery is junk.  

You have a bad connection at either the battery or the ground cable

50/50 show which one is right... well the guys at Sears are still most
likely idiots but they may be right and you have a bad connection.

Letting your battery drain down is the worse thing you can do to it.  If
your don't driving it regularly then get a battery tender.  If the sides of
the battery are bulged out or the battery is more than 3 years old there
isn't much life left in it anyway. 

With Toyota electronics it is most likely a simple problem and not the
starter, ignition switch or worse.

If you have a digital multi-meter you could do a voltage drop test on the
ground cable.  Attach one lead to the block and one to the negative terminal
on the battery

If you see more than a .1 volt reading you have a bad connection or cable.  

I would bet on the connection

Bob


Hey,
   
  Please explain this one to me.  I tried to start my 1991 Supra the other
day and it would not turn over..  I charged my battery (it is a garage
queen) and tried again with no luck.  I took the battery to Sears to have
them run a diagnostics check and it was fine.  I went home and then noticed
the following.
    
   Sometimes I have interior lights and other times I have none or very dim
ones  
   When I turn the key to the accessories setting, sometimes I get power to
the radio, HVAC, dash, etc.... other times they are all dead or very dim.  
   If I have power to the dash, radio, etc... and try to start it, it does
totally dead..no power to anything.
  Should I focus on the cables from the battery, the ignition switch,
starter, or something else?