  We present here the polarization image of the hybrid morphology (HYMOR) and
broad-absorption line (BAL) quasar PG1004+130 at 694~MHz obtained with the
upgraded Giant Metrewave Radio Telescope (uGMRT). We detect linear polarization
in this source's core, jets, and lobes. The visible discontinuity in total
intensity between the inner jets and the kpc-scale lobes suggests that the
source is restarted. The inferred poloidal magnetic (B-) field structure in the
inner jet is consistent with that observed in Fanaroff-Riley (FR) type II
sources, as are the B-fields aligned with the lobe edges. Moreover, archival
Chandra and XMM-Newton data indicate that PG1004+130 displays several
FRII-jet-like properties in X-rays. We conclude that PG1004+130 is a restarted
quasar, with both episodes of activity being FRII type. The spectral index
images show the presence of an inverted spectrum core ($\alpha=+0.30\pm0.01$),
a steep spectrum inner jet ($\alpha=-0.62\pm0.06$) surrounded by much steeper
lobe emission ($\alpha\approx-1.2\pm0.1$), consistent with the suggestion that
the lobes are from a previous activity episode. The spectral age difference
between the two activity episodes is likely to be small ($<1.2 \times 10^7$
years), in comparison to the lobe ages ($\sim 3.3\times 10^7$ years). The
inferred B-fields in the lobes are suggestive of turbulence and the mixing of
plasma. This may account for the absence of X-ray cavities around this source,
similar to what is observed in M87's radio halo region. The depolarization
models reveal that thermal gas of mass $\sim (2.4\pm0.9)\times 10^9$ M$_\odot$
is mixed with the non-thermal plasma in the lobes of PG1004+130.
