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Bavarian Soundwerks' Mobile Electronics Forum
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Old 05-16-2009, 09:06 PM   #1
shadowdmon
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PAC Tr7 question

I'm trying to hook up a Vehicle Hub Pro, 740BT screen, N872A navigation and a jenson DVD player. Just wondering how many Tr7s I am Going to need to be able to use everything while driving. I thought that I was only going to need one to place between the screen and hubpro but after reading a few other posts that don't have deffinitive answers I am second guessing. Thanks for any input.
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Old 05-17-2009, 03:53 PM   #2
shadowdmon
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Anyone?
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Old 05-18-2009, 10:08 AM   #3
skang330
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I am using 1 for my screen alone! I believe you need one for each device.
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Old 05-18-2009, 01:24 PM   #4
ca1242
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My guess is you need a TR& for the Alpine equipment. If the jensen is a straight CD player (no screen), it probably doesn't have a safety.
Go to alpine1.com and download the installation manuals for all the componets. You can easily figure out what you need by looking at the wiring diagrams.
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Old 05-18-2009, 08:31 PM   #5
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I only used one but used small relays to for the outputs since the TR7 current output is quite low. This was a little cheaper than getting two of them. Probably be a wiring headache for the novice.

If you get one of the older TR7, you might need to delay the output to the brake line as the 740BT needs to see the parking brake on before the foot brake released. Older TR7 dropped the signals simultaneously, failing to set the 740BT.
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Old 05-18-2009, 10:50 PM   #6
shadowdmon
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Thanks for the input, this has been a nightmare trying to get all this stuff in. Should have just went with the double din, oh well too late now, I think I'll just buy another TR-7 as the relays and such are out of my league. I appreciate the help.
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Old 05-19-2009, 08:41 AM   #7
ca1242
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A single TR7 should be able to handle everything. It doesn't really need to provide much current, since it is only driving logic inputs in the Alpine units, it isn't running anything.
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