Topic: Aerial leads and connections (Read 4112 times)

iansoutham · « **on:** 13 January 2019, 11:33:11 »

Have been reading through all the search facility on aerial connections and am after some clarification if possible?

Mine is a ‘97 mid-facelift CDX with no phone setup.

I currently run an Alpine aftermarket HU but have never had good reception from the radio so i suspect I have a damaged lead behind the dash as this sounds quite common. The roof aerial is good as I swapped it from my Astra Van a few years ago when trying to look into it then.

I have no aerial lead at all on the drivers side a-pillar unlike most. I have a grey coax on the passenger side a-pillar with a push-to-lock connection. Is this simply a different design for the DIN connection as in I will be able to put one of the DIN - ISO connector is its place and run a fresh cable?

Reason is that i am adding an Alpine DAB unit and this has an in and out for standard aerial as well as the DAB, so I was thinking of running from the A-pillar to the unit and then from the unit to the radio, all with new cabling.

Doctor Gollum · « **Reply #1 on:** 13 January 2019, 13:03:50 »

From the factory, ALL Omega aerial looms run down the righthand sill and up the C pillar. Without exception. Cars with phone capabilities and/or nav will have more wires... 2/3 signal ones and a power feed, but all follow the same route...

iansoutham · « **Reply #2 on:** 13 January 2019, 13:20:15 »

I have had a look and I have lots of wires running along the drivers sill bit nothing like coax.

On the passenger side a-pilllar, I have a RAKU II - RAST II connection on the grey wire that is the same colour as the one on the roof aerial. The roof aerial lead seems to go out to a screw connection above the roof light and then promptly goes to the near side of the car as far as I can tell.

If this RAST connection is not aerial, what is it?

Doctor Gollum · « **Reply #3 on:** 13 January 2019, 13:21:48 »

Telephone prewiring...

Saloon radio aerial is in the rear screen...

iansoutham · « **Reply #4 on:** 13 January 2019, 13:25:01 »

Mine is estate

iansoutham · « **Reply #5 on:** 13 January 2019, 13:26:07 »

Basing it on your way, where would I find this connection for the aerial in the A-pillar as there is no coax down by the big multiplug on the drivers side

Doctor Gollum · « **Reply #6 on:** 13 January 2019, 13:31:10 »

Someone had messed around with the wiring then...

Should be a 4/5mm grey cable running between blue plugs with a redwhite iirc 0.5mm wire...

iansoutham · « **Reply #7 on:** 13 January 2019, 13:58:18 »

Sure you are not thinking of the facelift cars?

Doctor Gollum · « **Reply #8 on:** 13 January 2019, 14:09:26 »

My direct experience is with facelift, but mid facelift cars had similar specs... ie phone and nav options.

Certainly only variations are saloon/estate, no/phone pre wiring, no/nav. On spec, looms are same to C pillar...

Your car should be wired as per Haynes

zirk · « **Reply #9 on:** 13 January 2019, 19:19:20 »

Quote from: iansoutham on 13 January 2019, 11:33:11

Have been reading through all the search facility on aerial connections and am after some clarification if possible?

Mine is a ‘97 mid-facelift CDX with no phone setup.

I currently run an Alpine aftermarket HU but have never had good reception from the radio so i suspect I have a damaged lead behind the dash as this sounds quite common. The roof aerial is good as I swapped it from my Astra Van a few years ago when trying to look into it then.

I have no aerial lead at all on the drivers side a-pillar unlike most. I have a grey coax on the passenger side a-pillar with a push-to-lock connection. Is this simply a different design for the DIN connection as in I will be able to put one of the DIN - ISO connector is its place and run a fresh cable?

Reason is that i am adding an Alpine DAB unit and this has an in and out for standard aerial as well as the DAB, so I was thinking of running from the A-pillar to the unit and then from the unit to the radio, all with new cabling.

Having read this thread I would concur with DG,

But it may have been possible if yours is a late PFL CDX. my thoughts are some CDX around this era had a Phillips HU and a Serperate Amp, the Amp and its Wiring was located on the left Passenger side, with the Amp location either in the Boot space or Under Dash, depending on whether Saloon or Estate (and I cant remember which way around now), so it would kind of make sense for this one off CDX Amp option to run the Aerial within the same area or location.

LC0112G · « **Reply #10 on:** 15 January 2019, 14:18:08 »

Comme ca - in the drivers footwell behind the kick panel :

The chunky grey wire is the radio aerial, the other two black coaxes are satnav and 'phone I believe. All on a 2001 saloon RHD elite.

iansoutham · « **Reply #11 on:** 15 January 2019, 14:28:38 »

Quote from: LC0112G on 15 January 2019, 14:18:08

Comme ca - in the drivers footwell behind the kick panel :

The chunky grey wire is the radio aerial, the other two black coaxes are satnav and 'phone I believe. All on a 2001 saloon RHD elite.

Brilliant.

I have that grey connection with the RAST connection shown but it is on the left side of the car.

The box is the same and I have no other cables as the car has no telematics.

I will try and run a continuity from the roof aerial to that connection to confirm link.

Weird thing is that if I disconnect that RAST connection the radio does not really change but if disconnecting at the back of the car, it loses a bit of signal (gets a bit crackly)

iansoutham · « **Reply #12 on:** 15 January 2019, 18:21:28 »

Okay, managed to get the car into the workshop at work and have run a continuity line between the connection to the roof aerial at the back through to the connection in the passenger footwell and can confirm that an October 1997 mfl does have the aerial lead on the ns a-pillar. Continuity of 0.004.

Doctor Gollum · « **Reply #13 on:** 15 January 2019, 18:33:10 »

That's a bit tenuous... Literally connected by one strand

The closer that number is to 1 the better... Alternatively, the nearer resistance is to zero $:-\$

iansoutham · « **Reply #14 on:** 15 January 2019, 18:54:24 »

Quote from: Doctor Gollum on 15 January 2019, 18:33:10

That's a bit tenuous... Literally connected by one strand

The closer that number is to 1 the better... Alternatively, the nearer resistance is to zero $:-\$

Sorry, I meant resistance is effectively zero.

Doctor Gollum · « **Reply #15 on:** 15 January 2019, 18:57:31 »

That's more like it

STEMO · « **Reply #16 on:** 15 January 2019, 21:34:48 »

OOOPS, wrong thread.

LC0112G · « **Reply #17 on:** 16 January 2019, 09:50:21 »

With the roof aerial disconnected, and the radio pulled out...

Check the resistance of the coax screen from end to end. Should be zero near as dammit.
Check the resistance of the coax core from end to end. Should be zero near as dammit.
Check the resistance from coax core to coax screen. Should be infinite near as dammit.

If ALL 3 of these conditions are correct, then the wire is almost certainly fine and the fault will be elsewhere.

iansoutham · « **Reply #18 on:** 16 January 2019, 10:27:11 »

Quote from: LC0112G on 16 January 2019, 09:50:21

With the roof aerial disconnected, and the radio pulled out...

Check the resistance of the coax screen from end to end. Should be zero near as dammit.
Check the resistance of the coax core from end to end. Should be zero near as dammit.
Check the resistance from coax core to coax screen. Should be infinite near as dammit.

If ALL 3 of these conditions are correct, then the wire is almost certainly fine and the fault will be elsewhere.

Fault will be at the front behind the radio almost certain, but will be double-checking when pulling it all apart at the weekend in the cold

LC0112G · « **Reply #19 on:** 16 January 2019, 10:33:08 »

The fault with my wiring was the connector to the roof aerial up behind the roof lining. Ok - that was a Sat-Nav coax wiring fault but I wouldn't trust any of the connectors.

http://www.omegaowners.com/forum/index.php?topic=88816.0

iansoutham · « **Reply #20 on:** 22 January 2019, 20:22:03 »

Update:

Changed the wire from the passenger footwell to the radio using a RAKU II to ISO converter lead and extension via the DAB unit (pass-thru so works DAB or analogue) and problem solved.

Looks like the original lead has about 3 potential breaks in it in the first 12 inches from the radio so no way to remake connections.

Have left it in place as cannot be bothered to try and remove at the moment.

Thanks for the help and it looks like it can be either side of the car for aerial leads....

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Author Topic: Aerial leads and connections (Read 4112 times)

STEMO