Difference between an antenna for a 91 and a 93?

[Z51JEFF]

The antenna looks pretty much the same except the plug,can an antenna from a 93 be made to work on a 91?Thanks.

[-=Jeff=-]

which plug? control or RF?

[Schrade]

I've got some OEM hardware if you're needing there...

Not sure of the year; my '90 has a '91-'95 body. I put in a '95 RoadMaster antennae - my tape drive was toast.

[secondchance]

Short answer - yes. I did install 94 antenna on a 91.
Difference is early cars had external relay whereas later versions have internal relay.
When I did the install I had a luxury of being able to look at both manuals. Perhaps you can have forum members send you PDFs of both. If I remember correct I bypassed external relay and wired as if it was a later car.

[Z51JEFF]

Short answer - yes. I did install 94 antenna on a 91.
Difference is early cars had external relay whereas later versions have internal relay.
When I did the install I had a luxury of being able to look at both manuals. Perhaps you can have forum members send you PDFs of both. If I remember correct I bypassed external relay and wired as if it was a later car.

Do you remember any of the details of the modification?I can get a new OEM 93 antenna for maybe $130.I replaced the mast in mine and the reception sucks,cant deal with it anymore.I can find plenty of used antennas but no new 90-91 antennas at a reasonable price,Im not cheap but cant see paying $400 for an antenna.The plug in question is the main power plug,the 93 plug is smaller than the 91 plug.I can get OEM connectors so changing the plug-connectors is the easy part.

[secondchance]

Do you remember any of the details of the modification?I can get a new OEM 93 antenna for maybe $130.I replaced the mast in mine and the reception sucks,cant deal with it anymore.I can find plenty of used antennas but no new 90-91 antennas at a reasonable price,Im not cheap but cant see paying $400 for an antenna.The plug in question is the main power plug,the 93 plug is smaller than the 91 plug.I can get OEM connectors so changing the plug-connectors is the easy part.

It's been about a year and a half. I have a 94 manual. I have to find a 91 wiring and try to trace back how I did it.
Unfortunately I need to fly back to Korea tomorrow and won't be back 'till 6/6/2013. Upon return, I can turn to Jim Voter for a early car electrical and hopefully trace back what I did.
Or if you have electrical for early year I'll take a look upon return.

[Schrade]

Do you remember any of the details of the modification?I can get a new OEM 93 antenna for maybe $130.I replaced the mast in mine and the reception sucks,cant deal with it anymore.I can find plenty of used antennas but no new 90-91 antennas at a reasonable price,Im not cheap but cant see paying $400 for an antenna.The plug in question is the main power plug,the 93 plug is smaller than the 91 plug.I can get OEM connectors so changing the plug-connectors is the easy part.

I replaced my antennae in my '94; turned out the bad reception afterwards was a missed connection on the ground-plane antennae...

Many late '90's GM antennaes (same connector) can be had from eBay for $30 - $50, sans 'Corvette tax'. Some need the 3-wire harness connector extended.