All my gauges don't work when i start my truck up. Only thing that works are my lights. My gas gauge , blinkers , ect don't work for me Do any of you guys know what part i need to replace ???

Mazda b2200 , 1988 ,auto

 

Different issues. First check the fuses that go to these.

If turn signals don't work - are bulbs OK, and the correct type, and the sockets not rusted or corroded? Get a test light or voltmeter to check this stuff out, under $20 at Sears. Is the turn signal relay under the dash clicking? You should be able to hear that. Do the emergency flashers work? That uses a second flsher relay. Both are under the dash on driver side, should hear and feel them click when they are working.

Most of these trucks (they're old now) need to have the sending unit in the fuel tank removed and either replaced or cleaned/have the contact arm bent:
Disconnect cable release and the two rubber hoses at the gas fill assembly (loosen and raise bed slightly [see below] to remove the larger one).
Remove the three 17mm-head bolts on the passenger side bed frame.
Loosen the corresponding bolts on the driver's side, about about 2/3 of the way. Use a 16 inch 2 x 4 on a floor jack to lift up the passenger side of the bed Tighten the jack, and up tilts the bed. I used a 1/4 inch drive ratchet, with 1/4 inch socket and a #2 Phillips bit (and two hands to hold it straight). All mine loosened, but maybe because I'm in Arizona there was no rust; I replaced with 7mm head hex head screws (4mm thread x 8mm long, with a wavy washer). To line up the bed so I could get the three 17mm head bolts back in on the passenger side, the bed needed to be jacked up a little, then I could use my weight to shift the bed a little from one side to the other.

Note: by the way, the new sending unit I special-ordered was bad at the shop (I took in my multimeter to test it) so I never took possession of that. This was a $50 made-in-China part, not from the Mazda dealer. So I fixed mine instead.