Craig,
I will make a prediction.  This van has a trailer wiring harness
installed.  Check to see if it does and get back to me.  These are evil and
need to be treated with Holy Water, then cut out like the cancer they are.
Once removed, the evil spirits will depart and the blinkers/brake lights
will behave normally again.

Ken Wilford
John 3:16
www.vanagain.com

On Sat, Feb 16, 2013 at 2:21 PM, Craig Cowan <phishman068@gmail.com> wrote:

> Thanks to all replied to my previous post about strange blinker problems.
> I've narrowed down the symptoms thus posting a new post.
> My 90gl auto has blinker problems.
> The left blinker blinks properly until the brakes are applied, then the
> taillight blinks the brake light rather than the blinker. This only Occurs
> on the left side.
> With the flashers on, they work fine, until you apply the brakes and the
> left taillight will blink the brake light.
>
> I have no idea where to start.
> I replaced the engine room grounds last week, though its possible I did a
> bad job.
>
> Any ideas?
> -craig